# US 5,344,692 A · Leather-containing laminate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,692 A - Document ID: US5344692A - Status: Granted - Kind: A - Application number: 08/044,990 - Filed: 1993-04-08 - Granted: 1994-09-06 - Earliest claimed: 1987-06-24 - Inventors: Helmuth Schmoock - Web page: https://patentgrep.com/patent/US5344692A ## CPC - B05D 1/28: performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers - B05D 1/286: {using a temporary backing to which the coating has been applied} - B05D 7/12: to leather (chemical treatment of leather C14C; dyeing leather D06P) - C14C 11/00: Surface finishing of leather - B05D 3/02: by baking {(B05D3/04 takes precedence)} - B05D 3/12: by mechanical means - B05D 7/52: {Two layers} - B05D 7/56: {Three layers or more} - Y10T 428/24074: Strand or strand-portions - Y10T 428/24091: with additional layer[s] - Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] - Y10T 428/24521: with component conforming to contour of nonplanar surface - Y10T 428/24612: Composite web or sheet - Y10T 428/24901: including coloring matter - Y10T 428/31558: Next to animal skin or membrane - Y10T 428/4935: Impregnated naturally solid product [e.g., leather, stone, etc.] - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - C14C: CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING (bleaching of leather or furs D06L; dyeing of leather or furs D06P) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A flexible laminate, wherein a substrate of leather carries a coating which enhances the appearance and/or the quality of the substrate, is formed between an anvil and a ram in a press. The coating has an inner layer which overlies and fills or nearly fills scratches and/or other unevennesses in one side of the substrate, and an outer layer which overlies the inner layer can be made of a plastic material. The outer layer is first applied to a flexible plastic or paper carrier, and the inner layer is sprayed or otherwise applied to the outer layer before the resulting coating is introduced into or conveyed through the clearance between the anvil and the ram. The exposed surface of the outer layer can be smooth or it can be profiled to imitate the grain of a particular type of leather, such as ostrich leather or alligator leather. The inner layer is bonded to the substrate in response to the application of heat and/or pressure, and its thickness is selected in such a way that it can fill major or minor unevennesses in the adjacent side of the substrate. ## Claims ### Claim 1 A flexible laminate comprising a low-grade or damaged leather substrate having a first side and a second side, at least one of said sides having unevennesses; and a coating adjacent said one side and having a first surface which adheres to said one side and a second surface facing away from said substrate, said coating comprising an outer layer adjacent said second surface and an inner layer disposed between said outer layer and said substrate and at least substantially filling the unevennesses of said one side, said inner layer consisting of a non cross-linked thermoplastic material which is flowable in response to heating and said inner layer having a dry weight of 15-50 g/m.sup.2, said thermoplastic material being applied to the one side of the substrate at a temperature of 110.degree.-130.degree. C. and at a pressure of approximately 30-50 kp/cm.sup.2 in dependency on selected temperature, said outer layer consisting of a plastic material which is solid within the temperature range causing the non cross-linked thermoplastic material of the inner layer to flow. ### Claim 2 (depends on 1) The laminate of claim 1, wherein said second surface is profiled. ### Claim 3 (depends on 1) The laminate of claim 1, wherein at least a portion of said inner layer is a hotmelt. ### Claim 4 (depends on 1) The laminate of claim 1, wherein said outer layer comprises a plurality of superimposed strata including an inner colored stratum and a light transmitting second stratum of polyurethane outwards of said colored stratum. ### Claim 5 (depends on 4) The laminate of claim 4, wherein said colored stratum contains polyurethane. ### Claim 6 (depends on 4) The laminate of claim 4, wherein said colored stratum has a dry weight of approximately 20 g/m.sup.2. ### Claim 7 (depends on 4) The laminate of claim 4, wherein said light transmitting second stratum has a dry weight of approximately 20 g/m.sup.2. ### Claim 8 (depends on 4) The laminate of claim 4, wherein said outer layer further comprises a third stratum containing a lacquer and disposed outwards of said second stratum. ### Claim 9 (depends on 8) The laminate of claim 8, wherein said third stratum has a dry weight of 1-2 g/m.sup.2. ### Claim 10 A method of making a flexible laminate comprising the step of applying to an uneven side of a leather-containing substrate, a coating having a first surface which adheres to and at least substantially fills the unevennesses in the uneven side of the substrate and a second surface facing away from the substrate, the coating having an inner layer of non cross-linked thermoplastic material which is flowable in response to heating and has a dry weight of 15-50 g/m.sup.2 and said applying step including heating the inner layer to a temperature of 110.degree.-130.degree. C. and pressing the inner layer against the uneven side of the substrate at a pressure of 30-50 kp/cm.sup.2, the coating further having an outer layer adjacent said second surface and consisting of a plastic material which is solid within the temperature range causing the non cross-linked thermoplastic material of the inner layer to flow.