US2109425A - Process of drying leather and similarly tautly stretched units - Google Patents
Process of drying leather and similarly tautly stretched units Download PDFInfo
- Publication number
- US2109425A US2109425A US61392A US6139236A US2109425A US 2109425 A US2109425 A US 2109425A US 61392 A US61392 A US 61392A US 6139236 A US6139236 A US 6139236A US 2109425 A US2109425 A US 2109425A
- Authority
- US
- United States
- Prior art keywords
- drying
- unit
- units
- air
- leather
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
- C14B2700/07—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards; Fastening devices; Drying of leather
Definitions
- This invention relates to a new and improved method of drying animal hides, leather or corresponding units of other materials, particularly those of irregular sizes and contours, which are 5 normally stretched on frames or boards individual to the units and wherein the units are secured to the drying and-stretching frames by toggles or other devices which grip each unit at spaced intervals around its edge.
- the loaded frames are usually inserted into a drier in relatively close laterally'spaced parallel relation to each other. Drying is effected by air blowing from one side or end of the drying chamber across and between the plurality of frames, with the air moving in the direction of the plane of each frame and across the unit carried thereby from one edge thereof toward the other edge thereof.
- the progressive drying of the unit from one side toward the opposite side thereof is responsible for detrimental strains being set up in the unit itself.
- unit dries it shrinks and where the drying is progressive from one side to the other the shrinking likewise follows from one side to the other, thus creating undesirable strains, under which the unit is placed by such uneven shrinkage, and which frequently causes the leather to pull loose from the toggles with a resultant damage to the leather at and adjacent the edges of the unit.
- the object of the present invention is to As the REISSUED,
- the unit dries in approximately one-third the time required for drying the same units under the old method above described.
- Fig. 1 is a vertical longitudinal section of the drier
- Fig. 2 is a sectional plan view taken on the line 2-2, Fig. 1;
- Fig. 3 is a vertical transverse section taken on the line 3-3.
- the apparatus comprises an outer casing l enclosing an air conditioning chamber 2 at one end, adrying chamber 1 at the opposite end, a circulating chamber 4 above the chambers 2 and 3 and extending longitudinally of the drier and a lower circulating chamber 8 extending longitudinally of the casing beneath the chambers 2 and 8.
- the circulating chambers .4 and 8 communicate at one end with the air conditioning chamber 2, through heating or cooling units 8 and L 7 vertical partitions I! which are of a foraminous nature throughout and which divide the chamber into frame receiving compartments l8, I8, in which the units of material to be dried are placed, and intermediate channels I! which communicate at one end with an air space I 8 formed at the one end of the drying chamber 3.
- the interiors of the compartments l8 communicate at their tops and bottoms respectively with the upper and lower circulating chambers 4 and 5.
- the vertical partitions I! as illustrated in the drawings are provided with perforations i8 over their entire areas.
- the leather or other units a are stretched tautly on suitable drying frames which each include in the present instance a perforated plate 20 having openings 28a over its entire surface for receiving the hooks of the toggles (not shown) which, as is well known in the art, grip the leather or other unit at desired points around the edges of the unit and support the unit in laterally spaced substantially parallel relation to the perforated plate 20.
- Each plate 20 is hung within a frame 2
- Each supporting frame 24 is provided with wheels 25 arranged to run on overhead tracks 28 mounted in the upper chamber 4 of the casing I.
- is provided with an endplate 21, said end plates combining-with vertical plates 28, 28 at the receiving end of the drier to form an end wall on the drier when the drying frames are in position within the drier.
- the partitions l8, II are spaced apart adjacent the air space l8 to form the mouths of the channels I! and converge toward the opposite end of the drier to progressively reduce the width of each channel ll.
- each converging pair of partitions II are joined together and to one of the end plates 28.
- each plate 28 mounted on each side of each plate 28. However, whether there is a unit on but one side or, a uniton each side of each plate, the air passing from the channels I! into the compartment i8 will impinge upon the one or both units a: at all points over the entire area thereof and substantially at right angles to the plane thereof, whereby uniform drying at all points throughout the area of each unit occurs simultaneously.
- vention to use a smaller number of larger holes distributed over the area of the unit or a single large hole at the center of the surface of the unit toproject the air against the .unit substantially at the center thereof or at'a number of points about the center of the unit to cause the air to move from the jet or Jets in contact with the surface of the unit toward the marginal edges thereof and whereby a uniform drying of the unit may be accomplished.
- the large number of small Jets is preferable.
- the method of drying wet tanned hides prior to staking or other finishing treatment of the surface of the hide which consists in stretching a hide in all directions outwardly from the central area thereof toward the marginal edges of the hide, securing the edges of the stretched hide to a suitable support to resist subsequent shrinkage of the hide, and impinging Jets of drying air against the surface of the hide at relatively closely spaced points simultaneously over substantially the entire area of said surface to effect uniform drying of the hide at substantially all points over the entire area of said surface simultane-
Description
Feb. 22, 1938. A. o. HURXTHAL I I I 2,109,425
PROCESS OF DRYING LEATHER AND SIMILARLY TAUTLY STRETCHED UNITS Filed Jan. 29, 1936 3 Shets-Sheet 1 OOOJUQOOODOLOO c o '2 on 000000 00000 0000' 70 0 oo'o or out" ODOOQUO Feb. 22, 1938. A. o. HURXTHAL PROCESS OF DRYING LEATHER AND SIMILARLY TAUTLY STRETCHED UNITS Filed Jan. 29 1936 3 Shets-Sheet 2 m a Q frz vezzz or Feb. 22, 1938. A. 0. HURXTHAL PROCESS OF DRYING LEATHER AND SIMILARLY TAUTLY STRETCHED UNITS Filed Jan, 29, 1936 3 Sheets-Sheet 3 Patented Feb. 22, 1938 PROCESS OF DRYING LEATHER AND SIMI- LARLY TAUTLY 'STRETCHED UNITS Alpheu's o. Hurxthal, Philadelphia, Pa., assignmto Proctor & Schwartz, Incorporated, Philadelphia, Pa., a corporation of Pennsylvania Application January 29, 1936, Serial No. 61,392
1 Claim.
This invention relates to a new and improved method of drying animal hides, leather or corresponding units of other materials, particularly those of irregular sizes and contours, which are 5 normally stretched on frames or boards individual to the units and wherein the units are secured to the drying and-stretching frames by toggles or other devices which grip each unit at spaced intervals around its edge.
I In the case of leather, 1. e. pretanned animal hides of different kinds; it is customary to stretch..- each unit on a frame comprising a wire mesh screen or perforated sheet capable of receiving the hooks of the toggles which are clamped to the edges of the unit to draw, stretch and hold the unit tightly and evenly over and throughout its entire area.
The loaded frames are usually inserted into a drier in relatively close laterally'spaced parallel relation to each other. Drying is effected by air blowing from one side or end of the drying chamber across and between the plurality of frames, with the air moving in the direction of the plane of each frame and across the unit carried thereby from one edge thereof toward the other edge thereof.
Under the above noted process, or system, that edge of the unit nearest the source of the drying air, and with which the air contacts first, begins travels. Consequently, that edge of the unit which lies furthest away from the source of the drying air dries last and before this edge is completely dry the opposite edge, that is, the edge nearest the source of drying air has become overdried, resulting in that edge and the adjacent portion of the unit becoming harsh while the last dried portion, which is dried to the proper extent, is relatively soft and pliable.
The progressive drying of the unit from one side toward the opposite side thereof, in addition to the above, is responsible for detrimental strains being set up in the unit itself. unit dries it shrinks and where the drying is progressive from one side to the other the shrinking likewise follows from one side to the other, thus creating undesirable strains, under which the unit is placed by such uneven shrinkage, and which frequently causes the leather to pull loose from the toggles with a resultant damage to the leather at and adjacent the edges of the unit. 3
The object of the present invention is to As the REISSUED,
cause the drying air to impinge upon all parts of the unit simultaneously, in a direction substantially perpendicular to the plane of the unit, whereby even and uniform drying and shrinking of .the unit is accomplished-at all points 'through- 5 out-its entire area at the same time.
Under the method forming the subject matter of the present invention the unit dries in approximately one-third the time required for drying the same units under the old method above described. I
In the drying of leather and similar-units, one
of they greatest handicaps of the industry has been the expense involved in the provision of sufficient numbers of frames and toggles. Under the method forming the subject of the present invention, and wherein the drying time is reduced to substantially one-third of the drying time required under the old method, it'naturally follows that eachframe and its complement of toggles is available for use three times as often as under the old method. Consequently, only onethird of the number of frames and toggles will be required for drying a predetermined number of units or three times as many units may be dried in the same time and with the same equipment as was formerly required for the drying of the lesser number of units.
Under'the old system in order to lessen the unequal, drying of the units and the detrimental effects thereof it was necessary to employ some form of humidifying apparatus in the drier for retaining or supplying moisture to the air in circulation. This condition lengthened the time necessary to dry the units, whereas under the system or process forming the subject of the present invention." it is possible to extract the moisture from the air in circulation and to impinge the dry air against the units, thus materially reducing the time necessary for the drying of each unit and at the same time eliminating the detrimental effects of the. strains normally set up by the unequal drying and shrinking under the old method.
The drying of leather or other units in accordance with the principles of the present invention may be readily carried on in an apparatus such as that disclosed .in the accompanying drawings, of which:
Fig. 1 is a vertical longitudinal section of the drier;
Fig. 2 is a sectional plan view taken on the line 2-2, Fig. 1; and
Fig. 3 is a vertical transverse section taken on the line 3-3. s-
'As shown in the drawings, the apparatus comprises an outer casing l enclosing an air conditioning chamber 2 at one end, adrying chamber 1 at the opposite end, a circulating chamber 4 above the chambers 2 and 3 and extending longitudinally of the drier and a lower circulating chamber 8 extending longitudinally of the casing beneath the chambers 2 and 8.
The circulating chambers .4 and 8 communicate at one end with the air conditioning chamber 2, through heating or cooling units 8 and L 7 vertical partitions I! which are of a foraminous nature throughout and which divide the chamber into frame receiving compartments l8, I8, in which the units of material to be dried are placed, and intermediate channels I! which communicate at one end with an air space I 8 formed at the one end of the drying chamber 3. The interiors of the compartments l8 communicate at their tops and bottoms respectively with the upper and lower circulating chambers 4 and 5. The vertical partitions I! as illustrated in the drawings are provided with perforations i8 over their entire areas.
The leather or other units a: are stretched tautly on suitable drying frames which each include in the present instance a perforated plate 20 having openings 28a over its entire surface for receiving the hooks of the toggles (not shown) which, as is well known in the art, grip the leather or other unit at desired points around the edges of the unit and support the unit in laterally spaced substantially parallel relation to the perforated plate 20.
Each plate 20 is hung within a frame 2| by suitable straps 22, and each frame 2| in turn is pivoted at its opposite sides, as illustrated at 23, 23, within a supporting frame 24. Each supporting frame 24 is provided with wheels 25 arranged to run on overhead tracks 28 mounted in the upper chamber 4 of the casing I.
Each of the frames 2| is provided with an endplate 21, said end plates combining-with vertical plates 28, 28 at the receiving end of the drier to form an end wall on the drier when the drying frames are in position within the drier.
As shown in Fig. 2, the partitions l8, II are spaced apart adjacent the air space l8 to form the mouths of the channels I! and converge toward the opposite end of the drier to progressively reduce the width of each channel ll. At the last said end of the drier each converging pair of partitions II are joined together and to one of the end plates 28.
With the fan I in operation, the air is moved or drawn out of the end compartment 2 and propelled into the air space II, at the one end of the chamber 3, and moves longitudinally of,
the drier from the air space l8 into the wide ends of the channels II. The converging relation of the perforated partitions l8 traps the iongitudinally flowing air and causes it to move out of the channels I! substantially at right angles thereto and'perpendicular to the partitions ll, entering the compartments i8 from opposite sides thereof and impinging upon the exposed surface of the unit 1 carried by each of the plates 28 within each compartment l8.
In some instances, there may be a unit a.
mounted on each side of each plate 28. However, whether there is a unit on but one side or, a uniton each side of each plate, the air passing from the channels I! into the compartment i8 will impinge upon the one or both units a: at all points over the entire area thereof and substantially at right angles to the plane thereof, whereby uniform drying at all points throughout the area of each unit occurs simultaneously.
vention to use a smaller number of larger holes distributed over the area of the unit or a single large hole at the center of the surface of the unit toproject the air against the .unit substantially at the center thereof or at'a number of points about the center of the unit to cause the air to move from the jet or Jets in contact with the surface of the unit toward the marginal edges thereof and whereby a uniform drying of the unit may be accomplished. However, the large number of small Jets is preferable.
I claim:
The method of drying wet tanned hides prior to staking or other finishing treatment of the surface of the hide. which consists in stretching a hide in all directions outwardly from the central area thereof toward the marginal edges of the hide, securing the edges of the stretched hide to a suitable support to resist subsequent shrinkage of the hide, and impinging Jets of drying air against the surface of the hide at relatively closely spaced points simultaneously over substantially the entire area of said surface to effect uniform drying of the hide at substantially all points over the entire area of said surface simultane-
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61392A US2109425A (en) | 1936-01-29 | 1936-01-29 | Process of drying leather and similarly tautly stretched units |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61392A US2109425A (en) | 1936-01-29 | 1936-01-29 | Process of drying leather and similarly tautly stretched units |
Publications (1)
Publication Number | Publication Date |
---|---|
US2109425A true US2109425A (en) | 1938-02-22 |
Family
ID=22035491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US61392A Expired - Lifetime US2109425A (en) | 1936-01-29 | 1936-01-29 | Process of drying leather and similarly tautly stretched units |
Country Status (1)
Country | Link |
---|---|
US (1) | US2109425A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2730787A (en) * | 1950-07-20 | 1956-01-17 | Bechtold Karl | Method and apparatus for securing work pieces |
US3132032A (en) * | 1960-07-01 | 1964-05-05 | Jr Raymond L Elster | Composition for pasting hides |
US3201812A (en) * | 1962-07-27 | 1965-08-24 | United Shoe Machinery Corp | Leather conditioning |
US4242811A (en) * | 1978-01-07 | 1981-01-06 | Sanko Air Plant, Ltd. | Thermo-pneumatic unit and apparatus for thermal treatment of travelling flat materials |
US4660308A (en) * | 1985-07-29 | 1987-04-28 | The Dow Chemical Company | Tentering frame for sheet-like members |
US20060289655A1 (en) * | 2005-06-24 | 2006-12-28 | Target Brands, Inc. | Stored-value card with whistle |
US20100071225A1 (en) * | 2008-09-19 | 2010-03-25 | Shannon Ross | Portable cooler drying frame |
-
1936
- 1936-01-29 US US61392A patent/US2109425A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2730787A (en) * | 1950-07-20 | 1956-01-17 | Bechtold Karl | Method and apparatus for securing work pieces |
US3132032A (en) * | 1960-07-01 | 1964-05-05 | Jr Raymond L Elster | Composition for pasting hides |
US3201812A (en) * | 1962-07-27 | 1965-08-24 | United Shoe Machinery Corp | Leather conditioning |
US4242811A (en) * | 1978-01-07 | 1981-01-06 | Sanko Air Plant, Ltd. | Thermo-pneumatic unit and apparatus for thermal treatment of travelling flat materials |
US4660308A (en) * | 1985-07-29 | 1987-04-28 | The Dow Chemical Company | Tentering frame for sheet-like members |
US20060289655A1 (en) * | 2005-06-24 | 2006-12-28 | Target Brands, Inc. | Stored-value card with whistle |
US20100071225A1 (en) * | 2008-09-19 | 2010-03-25 | Shannon Ross | Portable cooler drying frame |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2661543A (en) | Apparatus for and methods of drying leather | |
US2109425A (en) | Process of drying leather and similarly tautly stretched units | |
US2083141A (en) | Apparatus for conditioning sheet material | |
US2265071A (en) | Process of drying rugs | |
US1980558A (en) | Drying of fabrics | |
US3371428A (en) | Fabric drier | |
US2168478A (en) | Method of drying hides and skins | |
US2104135A (en) | Carbonizing drier | |
USRE20745E (en) | Process of drying leather and simi | |
US3577653A (en) | Web drying tunnel | |
US2284838A (en) | Method for drying porous wallboards | |
US2347109A (en) | Leather drier | |
US2758356A (en) | Textile tentering and drying apparatus | |
US2929153A (en) | Drying apparatus for sheet material | |
US2823467A (en) | Apparatus for the drying of thin wood sheet | |
US1472741A (en) | Drier | |
US1414856A (en) | Decalcomania and drying machine for pottery | |
US3545095A (en) | Method and apparatus for treating leather | |
US2050977A (en) | Machine for treating fabric | |
US1552099A (en) | Process of and apparatus for drying pervious material | |
US1470306A (en) | Art of and apparatus for drying materials | |
US2216244A (en) | Curtain drier | |
US2981007A (en) | Willow drier | |
US1562763A (en) | Drying apparatus | |
GB489749A (en) | An improved method of and apparatus for drying leather |