US2844928A - Wrapping machine - Google Patents

Description

July 29, 1958 E. w. cLEM 2,844,928

wRAPPING MACHINE Filed April 21, 1955 4 Sheets-Sheet 1 ATTORNEYS July 29, -1958 E. w. cLEM v 2,844,928

WRAPPING MACHINE Filed April 21, 1955 4 sheets-sheet 2 ATTORNEYS July 29, 1958 E( W.` CLEM WRAPPING MACHINE 4 Sheets-Sheet 5 Filed April 21, 1955 FIG.A 3

Y H4. ATTORNEYS July 29, 1958 Filed April 21, '1955 E. W. CLEM WRAPPING MACHINE 4 Sheets-Sheet 4 FIG. 4

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BY A. Y, W. [de mlm-w+,

ATTORNEYS United States Patent" @hice 2,844,928 Patented July 29, 1958 WRAPPING MACHINE Everett W. Clem, Shrewsbury, Mass., assignor to Rice Barton Corporation, Worcester, Mass., a corporation of Massachusetts Application April 21, 1955, Serial No. 502,916

8 Claims. (Cl. 53-198) This invention relates generally to a wrapping machine and more specically to a wrapping machine having one or more end wrap roll supporting carriages from which end wrap material may be drawn to wrap one or both ends-of a cylindrical object such as a roll of paper.

In industries such as the paper industry, it is often desirable to wrap the large rolls of paper produced with a protective layer of heavy wrapping paper. This layer of wrapping paper protects the roll of nished paper from damage in transit and moisture that may come in contact with it. The large rolls of finished paper may be straight wrapped with the protective layer or, as shown in my copending application Ser. No. 472,380, filed December 1, 1954, the rolls may be protected by a layer of spirally Wrapped paper. In either case, however, it is often desirable to apply an overlapping straight wrap on the ends of the rolls which serves as a further protective layer over thestraight or spiral Wrap and also provides added cushioning protection for the end edges of the rolls. It is an object of my invention to provide an apparatus for applying this reenforcing end-wrap to protect the ends of rolls of paper and also to provide in such apparatus means whereby the end-wrap may be easily applied to protect rolls of paper having varying lengths. This latter feature'is of particular importance because the rolls taken from paper machines arefoften of different lengths, and for economy and eliciency in handling should be wrapped successively as removed.

Further objects of my invention are to provide means for properly positioning a carriage carrying the end-wrap rollwith respect to the roll of paper to be wrapped and also means to prevent the carriage from inadvertent movement once it has been so positioned.

Broadly, my invention comprises providing a roll wrapping machine of the type, for example, Vset forth in my aforementioned copending application ywithY one -or more end Wrap roll carriages mounted thereon for movement relative to a roll supported thereby Vfor wrapping. It also includes the provision of means for moving the carriage or carriages and for locking them in variable fixed positions on the machine with respect to a roll supported thereby for Wrapping. y

More specifically, I proposed to provide on a Ywrapping machine a carriage for carrying a roll of end Wrap paper and movable longitudinally ,of the wrapping machine parallel tol theV axis of the roll of production paper which is to be Wrapped.V I provide on the Wrapping machine also'A a rotatable screw means which is adapted to be eni gaged. by va, threaded half-nut which intturn isurnounted on a reciprocating piston carried by'the end-Wrap carriage. Also mounted on this piston are locking means Which are adapted to engage a guide rail carried on the Wrapping machine. The locking means and threaded half-nut are so mounted on the piston that when the piston reaches one extreme of its reciprocating movement the locking means will engage the guide rail to prevent movement of the carriage (the threaded half-nut in this position of the piston being out of engagement with the screw means), and when the piston is at the other extreme of its reciprocating movement the threaded halfnut will engage the screw means and the locking means will move out of engagement Withthe guide rail. When the screw means is rotated and when the threaded halfnut is in engagement with the screw means, the end-wrap carriage will be moved longitudinally of the wrapping machine as the half-nut will be moved along the screw means. I further propose to provide an indicator means to be mounted on the end-wrap carriage and a scale means to be mounted on the wrapping machine so that the longitudinal position of the end-wrap carriage in relation to the roll (to be Wrapped) and to the supporting portion of the wrapping machine may be easily determined.

My invention will be clearly understood by referring to the accompanying drawings which illustrate, by way of example, a wrapping machine for wrapping large rolls of paper and to the following detailed description of that apparatus. In the drawings:

Fig. l is a front View of a Wrapping machine having mounted thereon two end-wrap carriages according to my invention;- l Y Fig. 2 is a side view of the wrapping machine of Fig. l;

Fig. 3 is an enlarged fragmentary sectional View of Fig. l taken along lines 3 3 and showing in more detail the supporting, driving and locking means for the carriages; and

Fig. 4 is a fragmentary front elevation partially in section of Fig. 3 taken along lines 4-4 thereof.

Referring to Fig. l, the reference numeral 1 denotes generally a wrapping machine for wrapping heavy rolls of paper 2 which may be either Straight wrapped or spirally wrapped as disclosed in my copending application Ser.V No. 472,380. The specilic means for wrapping the roll 2,with straight or spiral wrap are not shown as my present invention is concerned principally only With applying a protective stripof end-wrap which isaliixed over lthe main protective layer of straight or spiral wrap. The production roll of paper 2 isrotatably mounted on rollers 3 and 4 which are rotated by means not shown. Rolls 5 and 6 of end-wrap paper are carried, on carriages '7 and 8 which are movably mounted on the wrapping machine 1. A web or strip 9 from roll 5 and a vweb or strip 10 from roll 6 are threaded over rollers 11 and 12, as seen in Fig. 2 Aand are fastened on to the production roll of paper 2. The production roll 2 is then rotated so that the strips will be wound on the production roll.

It is ,seen byV referring to Fig. l that the strips of endwrap are so applied to the production roll 2 that a portion means of crimper heads 4Z and 43, fully'disclosed in my aforementioned copending application, and serves as cushions for they roll if they are Aplaced in an upright position and during other handling.

Considering inl detail the structure of the carriages '7 and 8, which are similar to each other andso have the same numerals denoting corresponding parts, reference numeral 11 denotes a shaft on which a roll 5 or 6 of end-wrap paper is rotatably mounted. The shaft 11 in turn is mounted in standards 12 which are formed byl tie bore 13 and tie plates 13. Rollers 'orwheels 14 are mounted on the vtie plates 1 3 and run on aplate 15 which extends longitudinally of the wrapping machine and which may be either mounted on the frame of the wrapping machine itself or carried by separate columns 16. Rollers 17 are carried on the tie plate 13' and bear on the bottom i of plate 15 in order to prevent the ycarriage from tilting.

plates 13. The guide rail and guide rollers serve to restrict movement of the end-wrap carriages 7 and 8 to a direction parallel to the longitudinal axis of the wrapping machine and of the production roll of paper. Provision for accommodating end-wrap rolls of. varying width is made by having slidable collars 41 (Fig. 1) on the shaft 11 between which the roll is placed.

A rotatable threaded shaft or screw means is mounted in bearings 21 and 22 which in turn are carried by plate 15. The threaded shaft 20 may be rotated through suitable gearing or clutching means 23 by any convenient means such'as reversible electric motor 23 shown in Fig. l. Mounted on standard 12 is a hydraulic cylinder V24 in which a piston 25 may slide. Piston 25 is actuated by either hydraulic or pneumatic pressure for which purpose it may be connected to a source of supply by lines 26 and 27. Piston 25 is connected by means of rod 2S to a threaded half-nut 29. The threads of this half-nut are of the same pitch as the threads of threaded shaft 20 so that when the half-nut is in engagement with the threaded shaft and when the latter is rotated, it will force the carriage to move in a direction parallel to the axis of the threaded shaft. Also mounted on threaded halfnut 29 on opposite sides thereof are locking clamps 30 and 31 which are attached to the threaded half-nut by means of bolts 32 and ride in vertical guides 33. A half round piece 34 which is carried by the tie plates 13' prevents the screw 20 from being deflected when the halfnut 29 is engaged. Thus when piston 25 is moved to its upper limit, the lower inturned ends of locking clamps and 31 will be brought to bear against the under faces of guide rail 18 and so lock the carriage against longitudinal movement. When the piston 25 is at the bottom limit of its reciprocal travel, however, the threaded half-nut 29 will be in engagement with threaded shaft 20 and the locking clamps 30 and 31 out of engagement with rail 18 so that the carriage will be free and may be moved longitudinally direction or the other of the wrapping machine in one of rthe threaded depending upon the direction of rotation shaft 20. Y

An indicator 35 is carried on each carriage and is adapted to indicate the longitudinal position of the carriage on the wrapping machine by reference to a scale 36 which is mounted on the wrapping machine below supporting plate 15. Limit switches 38 are adapted to be engaged by projections 39 (Fig. l) carried on the carriages in order to limit the movement of the carriages towards the end of the wrapping machine. Canvas brakes 40 are further mounted upon the carriages and serve to provide proper tension for the strips of end-wrap paper being applied to a production roll 2 of paper.

While two end-wrap carriages have been shown in my drawings, it is obvious to one skilled in the art that the end-wrapping of the production roll could be accomplished with one end-wrap carriage and that two carriages are used merely to speed up the wrapping of the production roll. Likewise, it is obvious that the reciprocating piston 25 could be actuated by other means than that shown and still come within the scope of the claims. I therefore do not limit myself to the specic embodiment herein chosen for illustration, but rather only to the extent set forth in the appended claims.

I claim:

1. A wrapping machine having a movable end-wrap carriage, screw means for moving said carriage longi tudinally of lsaid wrapping machine, a guide rail for guiding said carriage, a reciprocal piston mounted on said carriage, means for reciprocating said piston, a threaded half-nut carried by said piston for engagement with said screw means, locking means carried on said piston for engagement with said guide rail, said threaded half-nut engaging said screw means at one extreme limit of the reciprocal travel of said piston for moving said carriage, and said locking means engaging said guide rail at the other extreme limit of the reciprocal travel of said piston to lock said carriage against movement.

2. A wrapping machine according to claim 1 wherein said carriage has indicator means mounted thereon to indicate the longitudinal position of said carriage on said wrapping machine.

3. A wrapping machine according to claim 1 wherein said means for reciprocating said piston are fluid operated.

4. A wrapping machine having a movable end-wrap carriage, rotatable screw means for moving said carriage longitudinally of said wrapping machine, means for rotating said screw means, a reciprocal piston mounted on said carriage and carrying a threaded half-nut adapted to engage said screw means when said piston is at one extreme of its reciprocal travel, means for reciprocating said piston; said carriage being moved when said threaded half-nut is in engagement with said screw means and when said screw means are rotated.

5. A wrapping machine having a movable end-wrap carriage, a fixed guide rail for guiding said carriage, driving means mounted on said machine for driving said carriage along said guide rail, a reciprocal piston mounted on said carriage, means for reciprocating said piston, locking means carried on said piston for engagement with said guide rail when said piston is at one extreme limit of its reciprocal travel, said carriage being locked against movement when said locking means is in engagement with said guide rail, and drive engaging means carried on said piston and engageable with said driving means to drive said carriage upon disengagement of said locking means.

6. A wrapping machine having a movable end wrap carriage, means on said machine for guiding said carriage during movement, driving means mounted on said machine for driving said carriage, driven means mounted on said carriage and engageable with said driving means, and operating means on said carriage for placing said driven means in engagement with said driving means and for disengaging said driven means from said driving means.

7. A wrapping machine according to claim 6 which includes positive locking means for locking said carriage in any of its variety of positions on said machine.

8. A wrapping machine according to claim 7 in which the locking means is mounted on said carriage and in operatively connected to the operating means that places the driven means in engagement with the driving means, said locking means being operated to lock said carriage in place when said operating means is operated to disengage said driven means from said driving means and being operated to unlock said carriage when said operating means is operated to place said driven means in engagement with said driving means.

References Cited in the le of this patent UNTTED STATES PATENTS

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