Class 69/21 - PROCESSES

Subclass of Class 69 - Leather manufactures
Definition: Processes of treating hides, skins or leather not otherwise
No. of patents: 40
Last issue date: 02/08/2011

Number	Title	Issue Date
7882717	Resin particle reinforced leather product and method for producing the same An ABCITE® reinforced leather and a method for producing the ABCITE® reinforced leather for use in making shoes, gloves and garments are shown. ABCITE® pellets are ground into a fine powder and floated in a carrier so that they penetrate the fiber structure of a ...	02/08/2011
7552605	Natural grain leather A leather finishing process in which, in pertinent part, a warm water milling step is added after the base coat is applied to “crust” leather and cured. The warm water contains at least one dye fixation agent including but not limited to about 0.1-2.0% by weight...	06/30/2009
7378032	Coating composition for leather, coating method, and coated leather A paint composition for leather comprising a fluorine-containing resin and a silicone oil, and a paint composition for leather comprising a curable fluorine-containing resin, a curing agent and a silicone oil can have both soft feeling of a leather itself and film p...	05/27/2008
7250062	Method for removing horn substances from animal skin The invention relates to a method for removing horn substances from animal skin. The method is characterized in that animal skins are treated in an aqueous bath containing between 0.05 and 5 wt. %, in relation to the weight of the salt, of at least one compound of g...	07/31/2007
7225647	Leather working tool and method for cutting a leather strip A leather working tool and a method for cutting a leather strip. The strip cutting tool includes a tool head adapted for placement at least partially through the aperture formed through the sheet of material. A tool shaft is attached to and extends from the tool hea...	06/05/2007
7159717	Packaging design with separate compartments A gum packaging design that utilizes two separate compartments, an upper compartment and a lower compartment. Each of the compartments may be formed from a separate paperboard blank. The blanks are folded to form the compartments and then the lower compartment is ad...	01/09/2007
7013838	Bleached expanded pigskin and products Pigskin is processed to provide a bleached, expanded skin used in dog treat or chew products. The raw pigskin is dehaired and then daubed with an alkali mixture of an alkali liquid, alkali enzymes and lime, the mixture having a pH of greater than or equal to 12. The...	03/21/2006
7003997	Method and apparatus to reduce deformation in sheets cut by cutting tool The present invention is a method for reducing the deformation along a cut contour edge (26) of a sheet (2) caused by the cutting process whereby sheet material (4) protrudes above the top surface of the sheet being cut. One group of embodiments...	02/28/2006
6957554	Dehairing and fiber opening process for complete elimination of lime and sodium sulfide The use of lime and sodium sulfide in leather making creates a lot of environmental concern. However, there is no commercial beam house process that could totally eliminate the use of lime and sodium sulfide. In this invention, a novel bio-chemical process has been ...	10/25/2005
6708531	Ecofriendly bio-process for leather processing The present invention relates to an eco-friendly beam house process for de-hairing of leather using commercially available enzymes that obviates the use of lime and other alkalis. The present invention also provides an alternate process for opening the fibers of lea...	03/23/2004
6228300	Moldable footwear Moldable products which conform to the size and shape of a particular object and methods of forming the same are provided. The products are made from a material selected from the group consisting of natural leathers, synthetic leathers, and mixtures there...	05/08/2001
5854321	Graft copolymers of unsaturated monomers and sugars, a process for the production and the use thereof The present invention relates to water-soluble, acid-groups-containing graft copolymers which are at least partially biodegradable and are based on sugars and monoethylenically unsaturated carboxylic acids, sulfonic acids and/or phosphonic acids or the sa...	12/29/1998
5830238	Process for improving the surface yield in the fabrication of tanned hides Procedure to improve the area yield in the manufacture of leather consisting of a thermal treatment applied to the extended or stretched leather, before the operation of drying. During this treatment there should be no loss in the water content of the lea...	11/03/1998
5653130	Process and device for applying liquids to the surface of leather or similar flat materials A moving piece of leather on a bearing support will be moved parallel to a moving open-porous-structured, mesh-like (strainer) belt, the pores or meshes being filled with fluid. This fluid will be transmitted by pressure onto the leather surface. The pres...	08/05/1997
5539182	Process for increasing moisture permeability of leather, especially for seating in the automobile industry A leather layer is burned, preferably under a protective gas blanket, with a laser beam to increase the water vapor permeability for use of the leather in automotive vehicle seats....	07/23/1996
5480605	Method and apparatus for manufacturing coin pouch An apparatus and method for manufacturing leather coin pouches. The method provides for wetting a leather assembly comprising a substantially flat, flexible leather cover laminated to a substantially flat, more rigid centerpiece, to soften the leather whi...	01/02/1996
5291759	Process and equipment for stretching of leather A process for stretching leather and similar flat materials, characterized by at least one part of an initial surface of a piece of leather is placed on a bearing surface which is slidable with respect to the leather, the piece of leather being loaded wit...	03/08/1994
5050409	Method and apparatus for handling skins or hides A method of handling skins or hides having a central line of increased thickness along the back of the skin or hide between a tail end portion and a front end portion comprises displacing the skin or hide to a workstation by means of two clamping pincers ...	09/24/1991
5028285	Process for bonding leather to leather Bonding of leather to leather without the use of any adhesives is achieved by pressing together the two leather portions to be bonded at a pressure of at least about 50 bar and at a bonding temperature of from about 60° to about 200° C. for at least 10 ...	07/02/1991
5016452	Method of transferring photographs to leather A method of replicating a color photograph (11) onto a leather surface by transferring the photograph (11) to a xerographic copy (20), tracing the copy (20) onto the surface of the leather (50), using specialized leather working tools (30) to cut and rais...	05/21/1991
4959977	Machine for and method of performing a roughing operation progressively along marginal portions of a shoe bottom A machine for progressively roughing marginal portions of shoe bottoms comprising a shoe support (18) having toe support means (470) and a heel support arrangement including two sets of clamps (390, 392), one set (392) of which serves also as sensing mean...	10/02/1990
4458509	Treated reversible skin and a process for treating animal skins to form such a reversible skin Reversible treated hides are obtained by a process for treating animal skins. The process includes physiochemical operations, such as tanning, retanning, and finishing, to provide an aniline, semi-aniline, or pigmented hair-side appearance on the flesh si...	07/10/1984
4458080	Imidazoline derivatives Imidazoline derivatives of the formula ##STR1## in which R1, R2 and R3 designate C1 -C19 -alkyl or C2 -C19 -alkenyl, m and n designate 2 or 3, and A.crclbar. designat...	07/03/1984
4450764	Hide press and method for shipping hides A frame forms a container having four vertical sides and a flat bottom plate. A hydraulically raised and lowered gate forms one of the sides. Wet hides are stacked on a pallet commonly used with a forklift. The gate is raised, and the loaded pallet placed...	05/29/1984
4416125	Feed device equipment for letting out hides Equipment for letting out hides, in which the hides are cut several times obliquely to their lateral edges, the hide parts are then laterally offset and then sewn together again. A gripping tool is provided and is movable crosswise and lengthwise to the c...	11/22/1983
4330597	Process for dressing leather by a treatment using rubber latices Advantages in the dressing of leather, especially of split leather, with a synthetic rubber latex are obtained if in the leather dressing, the rubber latex is reacted with from 0.5 to 50% by weight, based on solid rubber, of one or more oxides and/or hydr...	05/18/1982
4325236	Process for manufacturing regenerated leather A process for manufacturing regenerated leather characterized by preparing a short-fiber and a long-fiber leather pulps from wasted natural leather; sending the two kinds of pulps separately to a refrigerator for freezing and then drying in a vacuum dryer...	04/20/1982
4294087	Enzymatic method for hair recovery with concurrent opening of hide structure What is disclosed is a method for the recovery of hair from an animal hide and for a concurrent opening of the hide structure using a proteolytic enzyme, which method comprises first pre-treating the hide, free of preservative salt, in the acid pH region ...	10/13/1981
4288498	Method of making leather fiber insulation by drying-case hardening and product thereof Chrome tanned leather scrap is converted into thermal insulation by shredding the tanned leather scrap into leather fibers, without damaging the structural fiber integrity, and case hardening the shredded leather fibers. The shredded leather fibers are ca...	09/08/1981
4259854	Method of obtaining natural leather with hair for warm unlined shoes The method of obtaining the leather resides in the treatment of cattle hides and includes the following successively performed operations: pretreating a raw hide, splitting it longitudinally to the thickness of 2.0 to 2.5 mm of the leather tissue, flushin...	04/07/1981
4239572	Method and apparatus for folding and welding the marginal edges of a cover sheet A cover sheet is disposed over a recess in a work table. A folding apparatus, including an edge folder and edge erector is disposed over the recess and lowered until the edge erector is in the recess. The edge erector includes horizontally movable plates ...	12/16/1980
4218901	System for working leather and like flexible sheet material A system, including apparatus and method for cutting leather and like flexible sheet material into straps and/or strips and for sequentially sizing and shaping the straps and/or strips uniformly, the apparatus comprising a cylindrical bar with shaping and...	08/26/1980
4131713	Leather yarn product and method of manufacture A leather yarn embodies a novel combination of five parameters which enables the leather yarn to be readily worked by garment knitting machine needlework into a unique knitted fabric having a soft "leather hand". The parameters are: 1. Softness; 2. Consistent ...	12/26/1978
4118959	Hide processing machine and method An improved hide processing machine has a hide-treating drum supported for rotation about a central longitudinal axis to retain and tumble hides and treating fluids at a closed end of the drum. The drum includes helical partition means extending across th...	10/10/1978
4111013	Method of and machine for removing oil from animal hides A method and machine for removing naturally occurring oil from animal hides, especially pig skins, which comprises passing the hides in the condition they are in at the conclusion of the conventional curing operation, with the hair side facing downward, b...	09/05/1978
4100771	Method and apparatus for flexibilizing leather A method of, and apparatus for, flexibilizing or softening leather or like materials wherein opposite marginal regions or lines of at least one area section of the piece of material to be worked and extending at least partially over such piece of material...	07/18/1978
4100007	Method of making paint roller cover A method of fabricating a paint roller cover or similar applicator fabricated partially from animal pelt, such as sheepskin or other like shrinkable material, comprising the steps of forming a sleeve of the shrinkable material, providing an internal core ...	07/11/1978
4055059	Methods and apparatus for dewatering leather A method of, and apparatus for, dewatering leather wherein there is provided at least a first dewatering-pressure zone and to both sides and neighboring such first dewatering-pressure zone two further dewatering-pressure zones producing a lower pressure t...	10/25/1977
4040278	Method of and apparatus for removing brine from hides A chain conveyor advances brine soaked hides hanging from hooks on the conveyor to a wringer consisting of a pair of vertically oriented pressure loaded power-driven rolls, and draws the hides through the wringer with the lengthwise dimension of the hides...	08/09/1977
3967474	Apparatus and method for manufacturing leather beading line and the novel product made thereby Beginning with leather lacing of substantially rectangular cross-section, moistening that lacing to a proper degree, drawing the moistened lacing through one or more shaping dies under controlled tension, drying the formed lacing and then applying an emol...	07/06/1976

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Class 69/21 - PROCESSES