US2536274A - Desiccant cartridge and method of making - Google Patents

Desiccant cartridge and method of making Download PDF

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Publication number
US2536274A
US2536274A US723591A US72359147A US2536274A US 2536274 A US2536274 A US 2536274A US 723591 A US723591 A US 723591A US 72359147 A US72359147 A US 72359147A US 2536274 A US2536274 A US 2536274A
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United States
Prior art keywords
tube
tubing
desiccant
coating
making
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Expired - Lifetime
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US723591A
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Richard S Gaugler
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Motors Liquidation Co
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Motors Liquidation Co
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Priority to US723591A priority Critical patent/US2536274A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003Filters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/496Multiperforated metal article making
    • Y10T29/49604Filter
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49808Shaping container end to encapsulate material
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/4998Combined manufacture including applying or shaping of fluent material
    • Y10T29/49993Filling of opening

Definitions

  • This invention relates to refrigerating apparatus and more particularly to an improved drier unit for use in refrigerant circuits and to an improved method of making the drier unit.
  • Figure l is an elevational view showing a woven wire tube of the type used inthe manufacture of the drier unit
  • Figure 2 is an elevational view with parts broken away showing apparatus used in the manufacture of the drier unit and showing one drier unit in the process of manufacture;
  • Figure 3 is an elevational view of a ldrier unit
  • Figure 4 is a sectional view taken on line 4-4 of Figure 3 showing the arrangement of the spiral reinforcing wire within the woven wire tubing which forms the outer casing of the unit.
  • the outer casing of the drier unit is made by taking a section of expansible woven wire tubing Il, such as shown in Figure 1 of the drawing, and twisting the lower end of the tubing as indicated at I2 in Figures 2 and 3 and then inserting this into a sizing tube or fixture I4 having an internal diameter substantially equal to the desired external diameter of the finished drier unit.
  • the tubing Il consists of interwoven wires extending helically in opposite directions.
  • the fixture I4 is vibrated by means of the vibration producing element 22 while the loose granular material is being fed into the tubing I0 so as to cause the granules to be packed in place. Since vibration producing elements are old and well known, and since the details of construction of the vibrating element are immaterial they need not be shown or described in greater detail.
  • the upper end of the tubing' is twisted as indicated at 24 in Figure 3 so as to close the upper end of the tubing. Closing the tubing against the ends of the wire I6 and the desiccant I8 prevents foreshortening of the tubing thereafter. Any dust which may result from abrasion of the particles during the filling operation may be blown off, if desired, during or subsequent to the filling operation.
  • the aembly is thereafter removed from the fixture I4 andis coated with a moisture permeable, moisture insoluble but dustproof material.
  • Preferably granular4 anhydrous calcium sulphate is used as the desiccant, although other materials such as lime, silica gel, or other alkaliv earth oxides may also be used.
  • the coating ma- V terial which I prefer to use is cellulose acetate,
  • the coating operation may be performed by sat urating the entire assembly comprising the screen tubing Il, the reinforcing helical wire IB and a granular desiccant material Iii,v with a ve to ten percent solution of celluloseacetate and thereafter allowing the excess solution to drain oi from the assembly so as to leave a porous structure.
  • Theassembly may be saturated in any manner such as by dipping it into a liquid solution of a coating material or by placing the assembly in a vessel, evacuating the vessel of air. replacing the evacuated air with the liquid solution so as to fill all of the voids, and thereafter removing the assembly from the vessel and allowing the excess solution to drain off leaving only a. thin cohesive binding coating on the parts.
  • Woven wire tubing material which will provide approximately a 16-mesh screen closure for the desiccant material is preferably used.
  • a cohesive drier unit of large effective surface area comprising a perforated casing; a hellcal-shaped reinforcng member within said perforated casing contacting and supporting the inner wall of said casing to prevent its collapsing and crushing; a granular desccant material within ,said casing; and a binding coating for said granular desiccant material, said reinforcing member, and said casing comprising a moisture permeable, moisture insoluble but dustproof combined binding and coating material; said coating serving to bond said granular desiccant, said re'nforcing member and said casing into a unitary cohesive structure.
  • a drier unit of the type in which a desiccant material is disposed within an expansible woven wire tube which comprises closing one end of said tube, expanding said tube while confined within a fixture having an internal diameter substantially corresponding to the nal external diameter of said drier unit, placing an expander element within said tube for establishing the internal diameter of said tube, placing granular desiccant material within the tube, closing the other end of said tube and thereafter applying a moisture permeable, moisture insoluble but dustprooi' binding coating to the exposed surfaces of said desiccant material and said tube.
  • a flexible woven wire tube element having helically extending interlaced l 4 wires, a rigid helical wire within said tube limiting inward exing of said tube element, said tube element having closed end-portions engaging the ends of said spiral wire so as to prevent foreshortening of said tube element, desiccant material within said tube element, and a coating of water permeable bonding material on the surface of said desiccant material and said helical wire and said woven wire tube element for increasing the rigidity of the assembb'.

Description

Jan. 2, 1951 R. s. GAUGLER 2,536,274
DESICCANT CARTRIDGE AND METHOD 0F MAKING Filed Jan. 22, 1947 INVENToR.
i I BY ,Mk
Patented Jan. 2, 1951 DESICCANT CARTRIDGE AND METHOD OF MAKING Richard S. Gaugler, Daytonkphio, assignor to General Motors Corporation, Dayton, Ohio, a
corporation of Delaware Application January 2z, 1941, semi No. 723,591
4 Claims.
This invention relates to refrigerating apparatus and more particularly to an improved drier unit for use in refrigerant circuits and to an improved method of making the drier unit.
It is an object of this invention to provide a low cost drier unit or desiccant cartridge which is not subject to breakage when handled roughly.
It is another object of this invention to provide an improved method and apparatus for manufacturing drier units of uniform size.
It is another object of this invention to provide drier units of uniform size in which granular particles of a desiccant material are compactly arranged within an outer perforated casing.
VFurther objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.
In the drawing:
Figure l is an elevational view showing a woven wire tube of the type used inthe manufacture of the drier unit;
Figure 2 is an elevational view with parts broken away showing apparatus used in the manufacture of the drier unit and showing one drier unit in the process of manufacture;
Figure 3 is an elevational view of a ldrier unit; and,
Figure 4 is a sectional view taken on line 4-4 of Figure 3 showing the arrangement of the spiral reinforcing wire within the woven wire tubing which forms the outer casing of the unit.
This application is related to application S. N. 697,980, filed September 19, 1946, wherein there is shown and claimed one form of drier unit.
It has been found desirable to maintain complete uniformity in the outer dimensions of the drier umts and to make them sufficiently rigid so that the likelihood of breakage during rough handling will be largely or entirely eliminated. Both of these desirable objectives are accomplished by my invention as set forth more fully hereinafter.
The outer casing of the drier unit is made by taking a section of expansible woven wire tubing Il, such as shown in Figure 1 of the drawing, and twisting the lower end of the tubing as indicated at I2 in Figures 2 and 3 and then inserting this into a sizing tube or fixture I4 having an internal diameter substantially equal to the desired external diameter of the finished drier unit. As shown in the drawing, the tubing Il) consists of interwoven wires extending helically in opposite directions.
(Cl. 21o-131) In order to expand the woven wire tubing to the desired diameter, pressure is first applied to push the upper end toward the lower end of the tubing and then a helically wound relatively stiil' wire I6 is forced into the upper end of the tubing while the tubing is mounted within the fixture I4. Woven wire tubing of this type may be purchased cheaplyvand comes in long lengths of small divthe funnel 20.
The fixture I4 is vibrated by means of the vibration producing element 22 while the loose granular material is being fed into the tubing I0 so as to cause the granules to be packed in place. Since vibration producing elements are old and well known, and since the details of construction of the vibrating element are immaterial they need not be shown or described in greater detail.
After the tubing I0 has been filled to the desired level, the upper end of the tubing'is twisted as indicated at 24 in Figure 3 so as to close the upper end of the tubing. Closing the tubing against the ends of the wire I6 and the desiccant I8 prevents foreshortening of the tubing thereafter. Any dust which may result from abrasion of the particles during the filling operation may be blown off, if desired, during or subsequent to the filling operation. The aembly is thereafter removed from the fixture I4 andis coated with a moisture permeable, moisture insoluble but dustproof material.
Preferably granular4 anhydrous calcium sulphate is used as the desiccant, although other materials such as lime, silica gel, or other alkaliv earth oxides may also be used. The coating ma- V terial which I prefer to use is cellulose acetate,
' although other materials such as ethyl cellulose, methyl cellulose, or any oi. the hydroscopic coatings of cellulose esters or ethers, may be used depending upon the particular application. Thus in a refrigerating system employing Freon refrigerant, it is preferred to use anhydrous calcium sulphate granules coated withvcellulose acetate so as to completely enclose the anhydrous calcium sulphate whereby fine particles of calcium sulphate are prevented from passing through the coating. l
The coating operation may be performed by sat urating the entire assembly comprising the screen tubing Il, the reinforcing helical wire IB and a granular desiccant material Iii,v with a ve to ten percent solution of celluloseacetate and thereafter allowing the excess solution to drain oi from the assembly so as to leave a porous structure. Theassembly may be saturated in any manner such as by dipping it into a liquid solution of a coating material or by placing the assembly in a vessel, evacuating the vessel of air. replacing the evacuated air with the liquid solution so as to fill all of the voids, and thereafter removing the assembly from the vessel and allowing the excess solution to drain off leaving only a. thin cohesive binding coating on the parts. Woven wire tubing material which will provide approximately a 16-mesh screen closure for the desiccant material is preferably used.
While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claims which follow.
What is claimed is as follows:
1. A cohesive drier unit of large effective surface area comprising a perforated casing; a hellcal-shaped reinforcng member within said perforated casing contacting and supporting the inner wall of said casing to prevent its collapsing and crushing; a granular desccant material within ,said casing; and a binding coating for said granular desiccant material, said reinforcing member, and said casing comprising a moisture permeable, moisture insoluble but dustproof combined binding and coating material; said coating serving to bond said granular desiccant, said re'nforcing member and said casing into a unitary cohesive structure.
2. The method of fabricating a drier unit of the type in which a desiccant material is disposed within an expansible woven wire tube which comprises closing one end of said tube, expanding said tube while confined within a fixture having an internal diameter substantially corresponding to the nal external diameter of said drier unit, placing an expander element within said tube for establishing the internal diameter of said tube, placing granular desiccant material within the tube, closing the other end of said tube and thereafter applying a moisture permeable, moisture insoluble but dustprooi' binding coating to the exposed surfaces of said desiccant material and said tube.
3. In combination, a flexible woven wire tube element having helically extending interlaced l 4 wires, a rigid helical wire within said tube limiting inward exing of said tube element, said tube element having closed end-portions engaging the ends of said spiral wire so as to prevent foreshortening of said tube element, desiccant material within said tube element, and a coating of water permeable bonding material on the surface of said desiccant material and said helical wire and said woven wire tube element for increasing the rigidity of the assembb'.
4. The method of fabricating a drier unit of the type in which a desiccant material is disposed within an expansible woven wire tube which comprises closing one end of the tube, expanding the tube to the desired nal diameter of the drier unit, placing an expander element within said tube for establishing the minimum internal diameter of the tube, vibrating the tube and expander element while placing granular desiccant material within the tube, closing the other end of-the tube, and thereafter applying a thin moisture permeable moisture insoluble dustproof binding coating to the entire assembly including the entire surfaces of the desiccant material andthe expander element and said tube to bind the as- The following references are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 913,325 Touzimsky Feb. 23, 1909 1,137,480 Gwynn Apr.- 27, 1915 1,218,975 yBrison Mar. 13, 1917 1,704,634 Snider Mar. 5, 1929 1,839,350 Slagel Jan. 5, 1932 2,175,775 Hum Oct. 10, 1939 2,203,815 Dahl et al June 11, 1940 2,260,608 Cormack Oct. 28, 1941 2,267,918 Hildabolt Dec. 30, 1941 2,365,149 Anderson Dec. 19, 1944 2,388,390 Cook et al. Nov. 6, 1945 2,433,531 Ryan Dec. 30, 1947 FOREIGN PATENTS Number Country Date 100,667 Australia Apr. 15, 1937 OTHER REFERENCES Mercks Index. 4th edition, 1930, Merck 8; Co. Inc., Rahway, N. J., p. 155.
US723591A 1947-01-22 1947-01-22 Desiccant cartridge and method of making Expired - Lifetime US2536274A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877903A (en) * 1956-11-29 1959-03-17 Arrow Tools Inc Filter unit
US3221478A (en) * 1961-10-02 1965-12-07 Products Company Van Gas drier
US5308665A (en) * 1989-02-28 1994-05-03 Baxter Diagnostics Inc. Impurity scavenger pillow
US5509853A (en) * 1994-07-11 1996-04-23 Wells; Del Method and manufacture for purifying the atmosphere
US5551557A (en) * 1994-10-25 1996-09-03 Convey, Inc. Efficient method and apparatus for establishing shelf-life of getters utilized within sealed enclosures
US5593481A (en) * 1995-09-25 1997-01-14 General Filters, Inc. Activated carbon air purifier
US6625863B2 (en) * 1997-10-09 2003-09-30 Millipore Corporation Methods for producing solid subassemblies of fluidic particulate matter
US20030213127A1 (en) * 2002-05-07 2003-11-20 Ralf Wnuk Process for production of conical filter elements
US20050201893A1 (en) * 2004-03-15 2005-09-15 Arno Michael J. Inline, point-of-use air/gas dryness indicator
US20050199403A1 (en) * 2004-03-15 2005-09-15 Arno Michael J. Compressed air/gas-driven tool with integrated dryness indicator
US20050247201A1 (en) * 2004-03-19 2005-11-10 Arno Michael J Disposable cartridge for air/gas dryer
US7108740B2 (en) 2004-03-15 2006-09-19 Michael J. Arno Flexible, inline, point-of-use air/gas filter/dryer
US20060230629A1 (en) * 2005-04-16 2006-10-19 Arno Michael J Wearable disposable dryer with carrying strap and stowage accessory

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US913325A (en) * 1907-09-09 1909-02-23 Ottomar Touzimsky Device for drying air, gas, &c.
US1137480A (en) * 1914-07-18 1915-04-27 Albert R Gwynn Gasolene-filter.
US1218975A (en) * 1916-06-09 1917-03-13 William R Brison Combined bung and strainer.
US1704634A (en) * 1925-11-27 1929-03-05 Charles H Snider Strainer
US1839350A (en) * 1929-07-29 1932-01-05 Fedders Mfg Co Inc Dehydrator
US2175775A (en) * 1937-08-30 1939-10-10 Luxe Products Corp De Method of winding cartridges
US2203815A (en) * 1939-03-15 1940-06-11 Dahl Otto Filter pack and method of and apparatus for making same
US2260608A (en) * 1940-03-14 1941-10-28 Crosley Corp Method of dehydrating refrigeration units
US2267918A (en) * 1940-03-27 1941-12-30 Gen Motors Corp Porous article and method of making same
US2365149A (en) * 1942-09-22 1944-12-19 Penn Electric Switch Co Filter and drier
US2388390A (en) * 1943-06-01 1945-11-06 Gen Motors Corp Desiccating agent
US2433531A (en) * 1940-07-30 1947-12-30 Kendall & Co Milk filter

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US913325A (en) * 1907-09-09 1909-02-23 Ottomar Touzimsky Device for drying air, gas, &c.
US1137480A (en) * 1914-07-18 1915-04-27 Albert R Gwynn Gasolene-filter.
US1218975A (en) * 1916-06-09 1917-03-13 William R Brison Combined bung and strainer.
US1704634A (en) * 1925-11-27 1929-03-05 Charles H Snider Strainer
US1839350A (en) * 1929-07-29 1932-01-05 Fedders Mfg Co Inc Dehydrator
US2175775A (en) * 1937-08-30 1939-10-10 Luxe Products Corp De Method of winding cartridges
US2203815A (en) * 1939-03-15 1940-06-11 Dahl Otto Filter pack and method of and apparatus for making same
US2260608A (en) * 1940-03-14 1941-10-28 Crosley Corp Method of dehydrating refrigeration units
US2267918A (en) * 1940-03-27 1941-12-30 Gen Motors Corp Porous article and method of making same
US2433531A (en) * 1940-07-30 1947-12-30 Kendall & Co Milk filter
US2365149A (en) * 1942-09-22 1944-12-19 Penn Electric Switch Co Filter and drier
US2388390A (en) * 1943-06-01 1945-11-06 Gen Motors Corp Desiccating agent

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877903A (en) * 1956-11-29 1959-03-17 Arrow Tools Inc Filter unit
US3221478A (en) * 1961-10-02 1965-12-07 Products Company Van Gas drier
US5308665A (en) * 1989-02-28 1994-05-03 Baxter Diagnostics Inc. Impurity scavenger pillow
US5509853A (en) * 1994-07-11 1996-04-23 Wells; Del Method and manufacture for purifying the atmosphere
US5551557A (en) * 1994-10-25 1996-09-03 Convey, Inc. Efficient method and apparatus for establishing shelf-life of getters utilized within sealed enclosures
US5593481A (en) * 1995-09-25 1997-01-14 General Filters, Inc. Activated carbon air purifier
US6625863B2 (en) * 1997-10-09 2003-09-30 Millipore Corporation Methods for producing solid subassemblies of fluidic particulate matter
US20030213127A1 (en) * 2002-05-07 2003-11-20 Ralf Wnuk Process for production of conical filter elements
US6836963B2 (en) * 2002-05-07 2005-01-04 Hydac Process Technology Gmbh Process for production of conical filter elements
US20050199403A1 (en) * 2004-03-15 2005-09-15 Arno Michael J. Compressed air/gas-driven tool with integrated dryness indicator
US20050201893A1 (en) * 2004-03-15 2005-09-15 Arno Michael J. Inline, point-of-use air/gas dryness indicator
US7108740B2 (en) 2004-03-15 2006-09-19 Michael J. Arno Flexible, inline, point-of-use air/gas filter/dryer
US7285156B2 (en) 2004-03-15 2007-10-23 Michael J. Arno Inline, point-of-use air/gas dryness indicator
US7332013B2 (en) 2004-03-15 2008-02-19 Arno Michael J Compressed air/gas-driven tool with integrated dryness indicator
US20050247201A1 (en) * 2004-03-19 2005-11-10 Arno Michael J Disposable cartridge for air/gas dryer
WO2005092478A3 (en) * 2004-03-19 2005-11-10 Michael J Arno Disposable cartridge for air/gas dryer
US20050268785A1 (en) * 2004-03-19 2005-12-08 Arno Michael J Disposable cartridge air/gas dryer
JP2007529313A (en) * 2004-03-19 2007-10-25 イリノイ トゥール ワークス インコーポレイティド Single-use cartridge for air / gas dryer
US7320725B2 (en) 2004-03-19 2008-01-22 Illinois Tool Works Inc. Disposable cartridge air/gas dryer
US7361214B2 (en) 2004-03-19 2008-04-22 Illinois Tool Works Inc. Disposable cartridge for air/gas dryer
US20060230629A1 (en) * 2005-04-16 2006-10-19 Arno Michael J Wearable disposable dryer with carrying strap and stowage accessory

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