# US 5,330,575 A · Method and apparatus for application of wallpaper paster > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,330,575 A - Document ID: US5330575A - Status: Granted - Kind: A - Application number: 07/978,254 - Filed: 1992-11-18 - Granted: 1994-07-19 - Earliest claimed: 1992-11-18 - Assignees: Blackhawk Metal Products, Inc. - Inventors: Robert N. Poole; Daniel L. Poole - Web page: https://patentgrep.com/patent/US5330575A ## CPC - B44C 7/04: for applying adhesive - Y10S 118/17: Wallpaper coater - Y10T 156/1798: with liquid adhesive or adhesive activator applying means - B44C: PRODUCING DECORATIVE EFFECTS (processes for applying liquids or other fluent materials to surfaces, in general B05D; shaping of plastics or substances in a plastic state B29C; printing processes to produce transfer pictures B41M3/12; thermographic duplication or marking methods B41M5/00); MOSAICS; TARSIA WORK (imitation of mosaic or tarsia work patterns B44F11/04); PAPERHANGING {(labels G09F; multi-step processes for making paper labels or tags B31D1/02)} - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A trough having an upstream end and a downstream end removably carrying an applicator roller rotated by driving means and a scraper bar, the scraper bar upstream of and adjacent the applicator roller, and a pressure area downstream of the applicator roller. A lid hingedly coupled to the trough, carrying an outfeed roller downstream of the scraper bar for guiding wallpaper over the applicator roller and the scraper bar. ## Claims ### Claim 1 A wallpaper paste applying apparatus for applying paste to a back surface of wallpaper comprising; a trough having an upstream end and a downstream end; an applicator roller removably carried by said trough; an adjustable scraper bar removably carried by said trough upstream of and adjacent to said application roller, said adjustable scraper bar including an elongate member extending between opposing sidewalls of said trough, said elongate member having a scraper portion with a hook shaped cross-section, said scraper portion having an apex extending longitudinally therealong positioned in an upward direction to contact said wallpaper, and a plurality of notches having an adjustable depth formed along said apex, said notches having an upstream edge, and a depth being the vertical distance between said apex and said upstream edge said depth adjustable by tilting said elongate member, thereby positioning said upstream edge to remove a predetermined level of paste from said wallpaper; drive means for driving said applicator roller; a lid removably and hingedly coupled to said trough for movement between an open position and a closed position; and an outfeed roller carried by said lid, positioned upstream of said adjustable scraper bar in the closed position. ### Claim 2 (depends on 1) A wallpaper paste applying apparatus as claimed in claim 1 wherein said trough further includes a pressure area downstream of said applicator roller for receiving a build-up of paste during operation, said build-up closing voids formed between said applicator roller and said paste, and contacting said applicator roller. ### Claim 3 (depends on 2) A wallpaper paste applying apparatus as claimed in claim 2 wherein said trough further includes: a bottom having a portion sloping downward from said upstream end to a substantially horizontal portion; opposing sidewalls extending upward from said bottom; an upstream endwall extending upward from said bottom at said upstream end; said applicator roller positioned adjacent said bottom proximate said downstream end; and a downstream endwall extending upward from said bottom at said downstream end, closely following the contours of said applicator roller. ### Claim 4 (depends on 3) A wallpaper paste applying apparatus as claimed in claim 3 wherein said pressure area is defined by said applicator roller and said downstream endwall, said downstream endwall constructed to closely follow the curve of said applicator roller and having an uppermost portion with an edge angled inward parallel to said applicator roller so as to form a space therebetween. ### Claim 5 (depends on 4) A wallpaper paste applying apparatus as claimed in claim 4 further comprising a flow control bar and means for adjustably coupling said flow control bar to said uppermost portion for varying said space. ### Claim 6 (depends on 5) A wallpaper paste applying apparatus as claimed in claim 5 wherein said adjustable coupling means includes slots formed in said flow control bar for receiving screws which extend through said slots into said uppermost portion. ### Claim 7 (depends on 3) A wallpaper paste applying apparatus as claimed in claim 3 wherein said drive means includes: a drive gear coupled to said outfeed roller; a driven gear coupled to said applicator roller; and coupling means for coupling said drive gear to said driven gear. ### Claim 8 (depends on 7) A wallpaper paste applying apparatus as claimed in claim 7 wherein said coupling means includes an idler gear carried by said lid, coupling said drive gear to said driven gear in the closed position. ### Claim 9 (depends on 7) A wallpaper paste applying apparatus as claimed in claim 7 wherein said applicator roller has a first post and a second post extending from opposing ends thereof, said first post rotatably and removably received by one of said sidewalls, and said second post removably received by the other of said sidewalls and rotatably secured thereto by said driven gear. ### Claim 10 (depends on 1) A wallpaper paste applying apparatus as claimed in claim 1 wherein said adjustable scraper bar further includes a catch portion extending from said scraper portion, which directs paste scraped from said wallpaper by said scraper portion directly onto said applicator roller. ### Claim 11 (depends on 1) A wallpaper paste applying apparatus as claimed in claim 1 wherein said outfeed roller has a gradual medial thickening to compensate for flex imparted thereto. ### Claim 12 A wallpaper paste applying apparatus for applying paste to a back surface of wall paper comprising: a trough having an upstream end, a downstream end, a bottom having a portion sloping downward from said upstream end to a substantially horizontal portion, opposing sidewalls extending upward from said bottom, an upstream endwall extending upward from said bottom at said upstream end, and a downstream endwall extending upward from said bottom at said downstream end; an applicator roller removably carried by said trough, positioned adjacent said bottom proximate said downstream end; and a pressure area downstream of said applicator roller, for receiving build-up of paste during operation, said build-up closing voids formed between said applicator roller and said paste, and contacting said applicator roller, said pressure area is defined by said applicator roller and said downstream endwall, said downstream endwall constructed to closely follow the curve of said applicator roller and having an uppermost portion with an edge angled inward parallel to said applicator roller so as to form a space therebetween. ### Claim 13 (depends on 12) A wallpaper paste applying apparatus as claimed in claim 12 further comprising a flow control bar and means for adjustably coupling said flow control bar to said uppermost portion for varying said space. ### Claim 14 (depends on 13) A wallpaper paste applying apparatus as claimed in claim 13 wherein said adjustable coupling means includes slots formed in said flow control bar for receiving screws which extend through said slots into said uppermost portion. ### Claim 15 A wallpaper paste applying apparatus for applying paste to a back surface of wallpaper comprising: a trough having an upstream end and a downstream end; an applicator roller removably carried by said trough; and a scraper bar carried by said trough upstream of said applicator roller, said scraper bar including an elongate member extending between opposing sidewalls of said trough, said elongate member having a scraper portion with a hook shaped cross-section, said scraper portion having an apex extending longitudinally therealong positioned in an upward direction to contact said wallpaper, and a plurality of notches having an adjustable depth formed along said apex, said notches having an upstream edge, and a depth being the vertical distance between said apex and said upstream edge said depth adjustable by tilting said elongate member, thereby positioning said upstream edge to remove a predetermined level of paste from said wallpaper. ### Claim 16 (depends on 13) A wallpaper paste applying apparatus as claimed in claim 13 wherein said adjustable scraper bar further includes a catch portion extending from said scraper portion, which directs paste scraped from said wallpaper by said scraper portion onto said applicator roller.