US20050274090A1 - System for sealing a packaging wrapper - Google Patents
System for sealing a packaging wrapper Download PDFInfo
- Publication number
- US20050274090A1 US20050274090A1 US11/209,056 US20905605A US2005274090A1 US 20050274090 A1 US20050274090 A1 US 20050274090A1 US 20905605 A US20905605 A US 20905605A US 2005274090 A1 US2005274090 A1 US 2005274090A1
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- US
- United States
- Prior art keywords
- conveying surface
- wrapper
- oven
- heated air
- mounting member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
- B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/20—Applying or generating heat or pressure or combinations thereof by fluid pressure acting directly on folds or on opposed surfaces, e.g. using hot-air jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
- B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7162—Boxes, cartons, cases
Definitions
- roofing shingles are typically stacked together and packaged in a rectangular bundle for storage or shipping.
- Plastic wrap e.g., nylon and polyethylene films, and combinations thereof
- the packaging material of choice for bundling shingles because the plastic is water proof and has sufficient strength to maintain the integrity of the stacked bundle, while at the same time being easy to open to access the shingles.
- a section of plastic wrap is folded around a shingle bundle and the wrapped bundle is sent through an oven on a conveyor.
- the oven is maintained at a temperature sufficient to cause the perimeter edges of the wrap that are folded over onto the remainder of the wrap to bond therewith and seal the shingle bundle within the wrap.
- it is often difficult to seal the wrap over opposed end portions of the shingle bundle.
- the present invention improves the coverage of a packaging wrapper around an object, such as a shingle bundle, by moving wrapper end flaps into contact with the body section of the wrapper and bonding the end flaps to the body section to form end seals. This results in less material usage as compared to conventional plastic wrapping methods while maintaining substantial, if not full, coverage of opposing end regions of the object.
- a system to seal a wrapper around an object.
- the system includes an oven, a conveyor, a source of heated air and a means for deflecting the flow of heated air to the conveyor to seal end flaps of the wrapper with a body section of the wrapper.
- heated air is moved through the oven bypassing the conveying surface to a region below the conveying surface.
- a set of dampers may be positioned adjacent to lateral side edges of the conveying surface to guide the heated air flow around the conveyor surface to the region below the conveying surface.
- the heated air flow encounters the means for deflecting the heated air flow, which directs the air flow upward and through the conveying surface to impact and move the end flaps into sealing contact with the wrapper body section.
- an end seal deflector is provided to guide a flow of heated air to seal a wrapper to substantially enclose an object being moved through an oven on a surface of a conveyor.
- the end seal deflector is formed of a mounting member for mounting the deflector within the oven and a deflecting member extending at an angle from the mounting member. Heated air flowing to a region below the conveying surface encounters the deflecting member and is directed through the conveying surface to impact end flaps of the wrapper and move the same into sealing contact with a body section of the wrapper surrounding the object to form the sealed wrapper substantially enclosing the object.
- FIG. 1 is a perspective view of a wrapper sealing system showing the end seal deflectors
- FIG. 2 is a perspective view of one end seal deflector
- FIG. 3 is a side elevational view of the end seal deflector of FIG. 2 ;
- FIG. 4 is a perspective view of a bundle of shingles enclosed by a packaging wrapper.
- FIG. 1 there is shown a system 10 for sealing a packaging wrapper 100 around an object 200 employing a set of end seal deflectors 12 .
- the end seal deflectors 12 are configured to guide a flow of heated air to seal the packaging wrapper 100 by impacting opposed end seals or flaps 102 of the wrapper 100 and moving the end flaps 102 into sealing contact with a body section 104 of the wrapper 100 surrounding the object 200 .
- the system 10 is ideally suited for use with packaging wrapper 100 that is formed in thin sheets out of plastics, such as nylon and polyethylene films, and combinations thereof. Additionally, while the present system 10 may be used to provide a wrapping a wide range of objects 200 , the system 10 will be described herein as used to provide a packaging wrapper for a bundle of roofing shingles or the like serving as the object 200 .
- the system 10 includes an oven 14 through which the object 200 is moved on a conveyor 16 and a source of heated air flow which fluidly communicates heated air flow to a pair of the end seal deflectors 12 .
- the conveyor 16 includes a conveying surface 18 upon which the partially wrapped shingle bundle 200 is placed for transporting the same through the oven 14 .
- the conveyor 16 is in the form of a conveyor chain that is porous to air flow.
- the source of heated air flow includes heating elements 20 positioned within the oven 14 , oven fans 22 for forcing a flow of air over the heating elements 20 to generate a heated air flow, and dampers 24 to guide the heated air flow through the oven around the conveyor 16 to a region 26 below the conveying surface 18 .
- This arrangement properly positions the heated air flow indicated by arrows H for deflection by the end seal deflectors 12 at an upward angle and preferably through the conveying surface 18 to impact the wrapper end flaps 102 and move the same into sealing contact with the wrapper body section 104 .
- the temperature and mass flow rate of the heated air impacting the end flaps 102 should be sufficiently high, and for a sufficient amount of time, to cause wrapper bonding between the flaps 102 and the body section 104 .
- Such parameters e.g., air flow temperature, mass flow rate, duration of air flow
- the dampers 24 may include a first barrier 28 disposed below the heating elements and a set of lateral dampers 30 preferably positioned generally above and adjacent to lateral side edges 40 of the conveying surface 18 .
- Dampers 24 served to initially deflect the heated air flow away from the conveying surface 18 , and the lateral dampers 30 guide the air flow in the direction of arrows H to bypass the conveying surface 18 and reach the region 26 below the conveying surface 18 .
- Other air flow pathways may be implemented with the present system 10 so long as a significant portion of the heated air flow avoids impacting the wrapper end flaps 102 from above, which could cause the flaps to bond or stick to the conveying surface 18 .
- the end seal deflectors 12 are positioned in the region 26 below the conveying surface 18 and receive the heated air flow guided by the dampers 24 .
- the deflector 12 comprise a mounting member 42 and a deflecting member 44 extending at an angle from the mounting member 42 .
- the deflecting member 44 has an planar impacting surface 46 against which the heated air flow deflects to be directed upwards through the conveying surface 18 .
- the deflector 12 may be formed of a single piece of sheet metal that is bent along a longitudinal edge 48 to form the mounting and deflecting members 42 , 44 ; this edge 48 also is preferably aligned parallel with the longitudinal axis of the conveying surface 18 so that the impacting surface 46 is properly oriented to evenly distribute the heated air flow to the end flaps 102 .
- the mounting member 42 may take the form of a first plate having various bores 50 to facilitate fasteners being inserted therethrough for attachment to an oven wall 15
- the deflecting member 44 may take the form of a second plate extending from the first plate at an angle of between about 30 and 60 degrees.
- each deflector 12 is generally V-shaped; however, other deflector shapes and angles between the mounting and deflecting members 42 , 44 , may be envisioned depending on the orientation of the surface to which the mounting member 42 is mounted (e.g., the oven wall 15 ) and the necessary angle of approach of heated air flow towards the wrapper end flaps 102 for impacting the flaps 102 and moving the same into sealing contact with the wrapper body section 104 .
- the angle 0 t formed by the intersection of a plane extending from impacting surface 46 and the plane of the conveying surface 18 —measured counterclockwise from the conveying surface— is about 30 to 60 degrees.
- the angle between the mounting and deflecting members 42 , 44 is further dependent on the lateral positioning of the deflecting member 42 with respect to the wrapper end flaps 102 on the conveying surface 18 .
- one effective end seal deflector 12 configuration is for the mounting member 44 to be about 8 inches in length (i.e., in the longitudinal direction of the conveying surface 18 ) and about 3 inches in width, the angle between the mounting and deflecting members 42 , 44 to be around 45 degrees, and the overall height of the deflector 12 to be about 2 inches.
- these dimensions will depend on the air flow parameters that affect the bonding of the wrapper end flaps 102 with the wrapper body section 104 (e.g., air flow temperature, mass flow rate, duration of air flow, etc.).
- the length of the deflecting member 42 may need to be longer or shorter than these exemplary dimensions depending on the speed at which the conveyor 16 moves the partially-wrapped shingle bundle 200 through the path of the heated air flow deflected by the deflector 12 .
- the shingle bundle 200 enters the oven 14 on the conveyor 16 with the wrapper body section 104 surrounding a body portion 202 of the bundle 200 and opposing end portions 204 of the bundle remaining exposed, as seen in FIG. 1 .
- opposed end flaps 102 extending from the wrapper body section 104 generally at a lower region 206 of the bundle end portions 204 —lie on the on the conveying surface 18 .
- the source of heated air directs the heated air flow to the end seal deflectors 12 , which deflect the air flow upward and through the conveying surface 18 to impact and fold the wrapper end flaps 102 upward as shown in FIG. 2 .
- the heat air flow is sufficient to hold the end flaps 102 against the opposing end portions 204 of the shingle bundle 200 for a time period necessary for bonding to occur between the flaps and the portion of the wrapper body section 104 that is partially covering the bundle end portions 204 .
- the shingle bundle 200 enclosed in the packaging wrapper 100 is then conveyed out of the oven 14 , and upon cooling is in a form ready for shipping or storage, as seen in FIG. 4 .
Abstract
A system for sealing a packaging wrapper around an object directs a flow of heated air to end flaps of the wrapper to move the end flaps into sealing contact with a body section of the wrapper to substantially enclose the object. The system includes an oven, a conveyor, a source of heated air and a means for deflecting the flow of heated air to the conveyor to seal end flaps of the wrapper with a body section of the wrapper. In use, an object surrounded by the wrapper body section is moved through the oven on a conveying surface of the conveyor, and heated air is moved through the oven bypassing the conveying surface to a region below the conveying surface. The heated air flow then encounters the means for deflecting the heated air flow, which directs the air flow upward and through the conveying surface to impact and move the end flaps into sealing contact with the wrapper body section.
Description
- None.
- Not Applicable.
- Roofing shingles are typically stacked together and packaged in a rectangular bundle for storage or shipping. Plastic wrap (e.g., nylon and polyethylene films, and combinations thereof) has become the packaging material of choice for bundling shingles because the plastic is water proof and has sufficient strength to maintain the integrity of the stacked bundle, while at the same time being easy to open to access the shingles.
- In the conventional method of shingle packaging, a section of plastic wrap is folded around a shingle bundle and the wrapped bundle is sent through an oven on a conveyor. The oven is maintained at a temperature sufficient to cause the perimeter edges of the wrap that are folded over onto the remainder of the wrap to bond therewith and seal the shingle bundle within the wrap. In this process, it is often difficult to seal the wrap over opposed end portions of the shingle bundle. Even if a good seal is achieved, it is often results from the use of an excessive overlapping amount of plastic wrap, which increases the expense of shingle packaging and forms a more bulky packaged product.
- It is therefore desirable to implement a shingle packaging solution where strong end seals are formed while only using the minimum amount of plastic wrap necessary. This will provide a reliable solution while keeping packaging material costs as low as possible.
- Accordingly, the present invention improves the coverage of a packaging wrapper around an object, such as a shingle bundle, by moving wrapper end flaps into contact with the body section of the wrapper and bonding the end flaps to the body section to form end seals. This results in less material usage as compared to conventional plastic wrapping methods while maintaining substantial, if not full, coverage of opposing end regions of the object.
- In one aspect of the invention, a system is provided to seal a wrapper around an object. The system includes an oven, a conveyor, a source of heated air and a means for deflecting the flow of heated air to the conveyor to seal end flaps of the wrapper with a body section of the wrapper. As the object is moved through the oven on a conveying surface of the conveyor, heated air is moved through the oven bypassing the conveying surface to a region below the conveying surface. A set of dampers may be positioned adjacent to lateral side edges of the conveying surface to guide the heated air flow around the conveyor surface to the region below the conveying surface. At this point, the heated air flow encounters the means for deflecting the heated air flow, which directs the air flow upward and through the conveying surface to impact and move the end flaps into sealing contact with the wrapper body section.
- In another aspect of the invention, an end seal deflector is provided to guide a flow of heated air to seal a wrapper to substantially enclose an object being moved through an oven on a surface of a conveyor. The end seal deflector is formed of a mounting member for mounting the deflector within the oven and a deflecting member extending at an angle from the mounting member. Heated air flowing to a region below the conveying surface encounters the deflecting member and is directed through the conveying surface to impact end flaps of the wrapper and move the same into sealing contact with a body section of the wrapper surrounding the object to form the sealed wrapper substantially enclosing the object.
-
FIG. 1 is a perspective view of a wrapper sealing system showing the end seal deflectors; -
FIG. 2 is a perspective view of one end seal deflector; -
FIG. 3 is a side elevational view of the end seal deflector ofFIG. 2 ; and -
FIG. 4 is a perspective view of a bundle of shingles enclosed by a packaging wrapper. - With reference to
FIG. 1 , there is shown asystem 10 for sealing apackaging wrapper 100 around anobject 200 employing a set ofend seal deflectors 12. Theend seal deflectors 12 are configured to guide a flow of heated air to seal thepackaging wrapper 100 by impacting opposed end seals orflaps 102 of thewrapper 100 and moving theend flaps 102 into sealing contact with abody section 104 of thewrapper 100 surrounding theobject 200. Thesystem 10 is ideally suited for use withpackaging wrapper 100 that is formed in thin sheets out of plastics, such as nylon and polyethylene films, and combinations thereof. Additionally, while thepresent system 10 may be used to provide a wrapping a wide range ofobjects 200, thesystem 10 will be described herein as used to provide a packaging wrapper for a bundle of roofing shingles or the like serving as theobject 200. - The
system 10 includes anoven 14 through which theobject 200 is moved on aconveyor 16 and a source of heated air flow which fluidly communicates heated air flow to a pair of theend seal deflectors 12. Theconveyor 16 includes aconveying surface 18 upon which the partially wrappedshingle bundle 200 is placed for transporting the same through theoven 14. Preferably, theconveyor 16 is in the form of a conveyor chain that is porous to air flow. - In one exemplary arrangement shown in
FIGS. 1 and 2 , the source of heated air flow includesheating elements 20 positioned within theoven 14,oven fans 22 for forcing a flow of air over theheating elements 20 to generate a heated air flow, anddampers 24 to guide the heated air flow through the oven around theconveyor 16 to aregion 26 below theconveying surface 18. This arrangement properly positions the heated air flow indicated by arrows H for deflection by theend seal deflectors 12 at an upward angle and preferably through theconveying surface 18 to impact thewrapper end flaps 102 and move the same into sealing contact with thewrapper body section 104. The temperature and mass flow rate of the heated air impacting theend flaps 102 should be sufficiently high, and for a sufficient amount of time, to cause wrapper bonding between theflaps 102 and thebody section 104. Those of skill in the art will appreciate that such parameters (e.g., air flow temperature, mass flow rate, duration of air flow) are a matter of design choice based on the specific wrapper material chosen, size of the shingle bundles and the necessary end flaps, among other factors. Thedampers 24 may include afirst barrier 28 disposed below the heating elements and a set oflateral dampers 30 preferably positioned generally above and adjacent tolateral side edges 40 of theconveying surface 18.Dampers 24 served to initially deflect the heated air flow away from theconveying surface 18, and thelateral dampers 30 guide the air flow in the direction of arrows H to bypass theconveying surface 18 and reach theregion 26 below theconveying surface 18. Other air flow pathways may be implemented with thepresent system 10 so long as a significant portion of the heated air flow avoids impacting thewrapper end flaps 102 from above, which could cause the flaps to bond or stick to theconveying surface 18. - The
end seal deflectors 12 are positioned in theregion 26 below theconveying surface 18 and receive the heated air flow guided by thedampers 24. As shown inFIG. 3 , thedeflector 12 comprise amounting member 42 and a deflectingmember 44 extending at an angle from themounting member 42. The deflectingmember 44 has an planar impactingsurface 46 against which the heated air flow deflects to be directed upwards through theconveying surface 18. Thedeflector 12 may be formed of a single piece of sheet metal that is bent along alongitudinal edge 48 to form the mounting and deflectingmembers edge 48 also is preferably aligned parallel with the longitudinal axis of theconveying surface 18 so that theimpacting surface 46 is properly oriented to evenly distribute the heated air flow to theend flaps 102. Themounting member 42 may take the form of a first plate havingvarious bores 50 to facilitate fasteners being inserted therethrough for attachment to anoven wall 15, and the deflectingmember 44 may take the form of a second plate extending from the first plate at an angle of between about 30 and 60 degrees. Thus, eachdeflector 12 is generally V-shaped; however, other deflector shapes and angles between the mounting and deflectingmembers mounting member 42 is mounted (e.g., the oven wall 15) and the necessary angle of approach of heated air flow towards thewrapper end flaps 102 for impacting theflaps 102 and moving the same into sealing contact with thewrapper body section 104. For example, ideally the angle 0 t formed by the intersection of a plane extending from impactingsurface 46 and the plane of the conveyingsurface 18—measured counterclockwise from the conveying surface—is about 30 to 60 degrees. The angle between the mounting and deflectingmembers member 42 with respect to thewrapper end flaps 102 on theconveying surface 18. - The inventors have found that, in use with
system 10, one effectiveend seal deflector 12 configuration is for themounting member 44 to be about 8 inches in length (i.e., in the longitudinal direction of the conveying surface 18) and about 3 inches in width, the angle between the mounting and deflectingmembers deflector 12 to be about 2 inches. Of course, these dimensions will depend on the air flow parameters that affect the bonding of thewrapper end flaps 102 with the wrapper body section 104 (e.g., air flow temperature, mass flow rate, duration of air flow, etc.). For example, the length of the deflectingmember 42 may need to be longer or shorter than these exemplary dimensions depending on the speed at which theconveyor 16 moves the partially-wrappedshingle bundle 200 through the path of the heated air flow deflected by thedeflector 12. - In use of the
system 10, theshingle bundle 200 enters theoven 14 on theconveyor 16 with thewrapper body section 104 surrounding abody portion 202 of thebundle 200 and opposingend portions 204 of the bundle remaining exposed, as seen inFIG. 1 . At this point, opposedend flaps 102—extending from thewrapper body section 104 generally at a lower region 206 of thebundle end portions 204—lie on the on theconveying surface 18. The source of heated air directs the heated air flow to theend seal deflectors 12, which deflect the air flow upward and through the conveyingsurface 18 to impact and fold thewrapper end flaps 102 upward as shown inFIG. 2 . The heat air flow is sufficient to hold theend flaps 102 against theopposing end portions 204 of theshingle bundle 200 for a time period necessary for bonding to occur between the flaps and the portion of thewrapper body section 104 that is partially covering thebundle end portions 204. Theshingle bundle 200 enclosed in thepackaging wrapper 100 is then conveyed out of theoven 14, and upon cooling is in a form ready for shipping or storage, as seen inFIG. 4 . - With this arrangement, implementation of the system of the present invention achieves a high quality packaging wrapper that is neat in appearance and easily formed using a conventional industrial oven for wrapper bonding. Since certain changes may be made in the above invention without departing from the scope hereof, it is intended that all matter contained in the above description or shown in the accompanying drawing be interpreted as illustrative and not in a limiting sense. It is also to be understood that the following claims are to cover certain generic and specific features described herein.
Claims (23)
1. In a system for sealing a wrapper around an object within an oven, the system including a conveyor having a conveying surface for transporting the object through the oven and a heat source for causing the wrapper surrounding the object to form a sealed wrapper substantially enclosing the object, the conveying surface configured to allow the flow of air therethrough, and the wrapper having a body section surrounding the object and opposing end flaps extending from the body section, the improvement comprising:
the heat source comprising a heated air movement source for moving a volume of air through the oven to a region below the conveying surface; and
means, positioned within the oven, for deflecting the heated air flow entering the region below the conveying surface upward and through the conveying surface to impact the opposing end flaps and move the flaps upward into sealing contact with the wrapper body section.
2. The system of claim 1 , wherein the conveying surface of the conveyor has opposing lateral side edges, and wherein the heated air movement source comprises:
one or more heating elements;
one or more fans moving air over the one or more heating elements; and
a set of dampers positioned adjacent to the lateral side edges of the conveying surface to guide the heated air flow around the conveyor surface to the region below the conveying surface.
3. The system of claim 1 , wherein the means for deflecting the heated air flow comprises an end seal deflector having a mounting member and a deflecting member extending at an angle from the mounting member.
4. The system of claim 3 , wherein the mounting member comprises a first plate having one or more holes to facilitate a fastener being extended therethrough for securing the mounting member to a structure within the oven, and the deflecting member comprises a second plate extending from the first plate at an angle of between about 30 to 60 degrees.
5. The system of claim 3 , wherein the mounting member has an impacting surface, and wherein the end seal deflector is mounted such that an angle ct formed by the intersection of a plane of the impacting surface and a plane of the conveying surface is about 30 to 60 degrees measured counterclockwise from the plane of the conveying surface.
6. The system of claim 1 , wherein the conveying surface comprises a conveyor chain.
7. The system of claim 1 , wherein the object is a bundle of roofing shingles having opposing end regions, and wherein the flaps in sealing contact with the wrapper body section substantially cover exposed areas of the bundle end regions.
8. An end seal deflector for guiding a flow of heated air in an oven upward through a porous conveying surface of a conveyor upon which a partially wrapped object is positioned, comprising:
a mounting member for mounting the deflector within the oven; and
a deflecting member extending at an angle from the mounting member;
whereby a flow of heated air encountering the deflecting member is directed through the conveying surface to impact end flaps of a wrapper surrounding the object and move the end flaps into sealing contact with a body section of the wrapper to form a sealed wrapper substantially enclosing the object.
9. The deflector of claim 8 , wherein the mounting member comprises a first plate having one or more holes to facilitate a fastener being extended therethrough for securing the mounting member to a structure within the oven, and the deflecting member comprises a second plate extending from the first plate at an angle of between about 30 to 60 degrees.
10. The deflector of claim 8 , wherein the deflector is generally V-shaped.
11. The deflector of claim 8 , wherein the deflector is formed of sheet metal.
12. A system for improving the end seal of a wrapped object, the object having a wrapper body surrounding the object with opposing end flaps extending from the body, the system comprising:
an oven;
a conveyor positioned in the oven and having a conveying surface operative to convey an object through the oven, the conveying surface configured to allow air flow therethrough;
a source of heated air for moving a volume of air through the oven bypassing the conveying surface to a region below the conveying surface; and
means, positioned within the oven, for deflecting the heated air flow entering the region below the conveying surface upward and through the conveying surface to impact the opposing end flaps and move the flaps upward into sealing contact with the wrapper body.
13. The system of claim 12 , wherein the conveying surface of the conveyor has opposing lateral side edges, and wherein the source of heated air comprises:
one or more heating elements;
one or more fans moving air over the one or more heating elements; and
a set of dampers positioned adjacent to the lateral side edges of the conveying surface to guide the heated air flow around the conveyor surface to the region below the conveying surface.
14. The system of claim 12 , wherein the means for deflecting the heated air flow comprises an end seal deflector having a mounting member and a deflecting member extending at an angle from the mounting member.
15. The system of claim 14 , wherein the mounting member comprises a first plate having one or more holes to facilitate a fastener being extended therethrough for securing the mounting member to a structure within the oven, and the deflecting member comprises a second plate extending from the first plate at an angle of between about 30 to 60 degrees.
16. The system of claim 14 , wherein the mounting member has an impacting surface, and wherein the end seal deflector is mounted such that an angle a formed by the intersection of a plane of the impacting surface and a plane of the conveying surface is about 30 to 60 degrees measured counterclockwise from the plane of the conveying surface.
17. A process for packaging an object with a plastic wrapper in an oven, the wrapper having a body section and opposed end flaps extending therefrom to form a sealed wrapper substantially enclosing the object, the process comprising the steps of:
conveying the object through an oven on a conveying surface, the object having a body portion and opposed end regions, the plastic wrapper body section surrounding the body portion such that the opposed end flaps extend generally away from a lower region of the opposed end regions of the object;
generating and moving heated air through the oven bypassing the conveying surface to a region below the conveying surface;
deflecting the heated air reaching the region below the conveying surface upwards and through the conveying surface to impact and move the opposed end flaps upward into contact with the wrapper body section substantially over the opposed end regions of the object; and
sealing the opposed end flaps with the wrapper body section.
18. The process of claim 17 , wherein sealing the opposed end flaps comprises maintaining the deflected flow of heated air on the end flaps at a mass flow rate and for a time sufficient to cause the end flaps to bond with the wrapper body section.
19. The process of claim 17 , wherein the object is a bundle of roofing shingles.
20. The process of claim 17 , wherein the conveying surface has opposing lateral side edges, and wherein the heated air moved through the oven bypasses the conveying surface by encountering a set of dampers positioned adjacent to the lateral side edges of the conveying surface to guide the heated air flow around the conveyor surface to the region below the conveyor surface.
21. The process of claim 17 , wherein the heated air reaching the region below the conveying surface is deflected by an end seal deflector having a mounting member and a deflecting member extending at an angle from the mounting member.
22. The process of claim 21 , wherein the mounting member comprises a first plate having one or more holes to facilitate a fastener being extended therethrough for securing the mounting member to a structure within the oven, and the deflecting member comprises a second plate extending from the first plate at an angle of between about 30 to 60 degrees.
23. The process of claim 17 , wherein the conveying surface comprises a conveyor chain.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/209,056 US20050274090A1 (en) | 2004-05-12 | 2005-08-22 | System for sealing a packaging wrapper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/844,082 US20050252174A1 (en) | 2004-05-12 | 2004-05-12 | System for sealing a packaging wrapper |
US11/209,056 US20050274090A1 (en) | 2004-05-12 | 2005-08-22 | System for sealing a packaging wrapper |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/844,082 Division US20050252174A1 (en) | 2004-05-12 | 2004-05-12 | System for sealing a packaging wrapper |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050274090A1 true US20050274090A1 (en) | 2005-12-15 |
Family
ID=35308085
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/844,082 Abandoned US20050252174A1 (en) | 2004-05-12 | 2004-05-12 | System for sealing a packaging wrapper |
US11/209,135 Active US7472529B2 (en) | 2004-05-12 | 2005-08-22 | System for sealing a packaging wrapper |
US11/209,056 Abandoned US20050274090A1 (en) | 2004-05-12 | 2005-08-22 | System for sealing a packaging wrapper |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
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US10/844,082 Abandoned US20050252174A1 (en) | 2004-05-12 | 2004-05-12 | System for sealing a packaging wrapper |
US11/209,135 Active US7472529B2 (en) | 2004-05-12 | 2005-08-22 | System for sealing a packaging wrapper |
Country Status (2)
Country | Link |
---|---|
US (3) | US20050252174A1 (en) |
CA (1) | CA2505279A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130020381A1 (en) * | 2009-02-03 | 2013-01-24 | Koch Stephen A | Process of Producing Hip, Ridge or Rake Shingles, Shingles Produced Thereby and Stacks of the Shingles |
CN109693839A (en) * | 2019-01-28 | 2019-04-30 | 张兴宇 | A kind of Heat shrinkage film cloth roll packing machine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US7991895B2 (en) * | 2005-12-09 | 2011-08-02 | Nokia Corporation | Limiting access to network functions based on personal characteristics of the user |
CA2577380A1 (en) * | 2007-02-06 | 2008-08-06 | Hood Packaging Corporation | Easy opening shrink wrapper for product bundle |
US20100150682A1 (en) * | 2008-12-11 | 2010-06-17 | Klassen Walter D | Forming, insertion and end crimping of helical coils for bookbinding |
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Also Published As
Publication number | Publication date |
---|---|
US20050252174A1 (en) | 2005-11-17 |
US7472529B2 (en) | 2009-01-06 |
US20060032194A1 (en) | 2006-02-16 |
CA2505279A1 (en) | 2005-11-12 |
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Legal Events
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |