# US 8,464,975 B2 · Non-stop unwinding device with limited bulk for rolls of web-like material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,975 B2 - Document ID: US8464975B2 - Status: Granted - Kind: B2 - Application number: 12/452,749 - Filed: 2008-07-23 - Published: 2010-11-18 - Granted: 2013-06-18 - Earliest claimed: 2007-07-25 - Assignees: Omet S.R.L. - Applicants: Angelo Bartesaghi; Roberto Perego - Inventors: Angelo Bartesaghi; Roberto Perego - Web page: https://patentgrep.com/patent/US8464975B2 ## CPC - B65H 16/04: cantilever type - B65H 19/123: {with cantilever supporting arrangements} - B65H 2404/20: Belts - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES ## Abstract An unwinding device (10) is described for unwinding rolls (12, 14) of one-ply or two-ply web-like material (24). The device (10) comprises: a support group for sustaining a first roll (12) and a second roll (14), the support group being composed of a support pin (16) for each roll (12, 14), the support pins (16) being bound on two opposite sides of a vertical column (18) made integral with the base (20) of the unwinding device (10); an unwinding mechanism (22) for each roll (12, 14), adapted to unwind the web-like material (24) from the rolls (12, 14); a joining mechanism (26), adapted to join specific web-like material portions (24) together that respectively come from the first roll (12) and from the second roll (14). One of the support pins (16) is bound to the vertical column (18) at a height (H1), measured with respect to the base (20), that is different from the height (H2) of the second support pin (16) bound on the opposite side of the vertical column (18), so as to limit the thickness of the vertical column (18) along with the width of the unwinding device (10) as much as possible. ## Claims ### Claim 1 An unwinding device (10) for unwinding rolls (12, 14) of one-ply or two-ply web-like material (24), the device (10) comprising: a support group for sustaining a first roll (12) and a second roll (14), said support group being composed of a support pin (16) for each roll (12, 14), said support pins (16) being bound on two opposite sides of a vertical column (18) made integral with the base (20) of said unwinding device (10); an unwinding mechanism (22) for each of said first roll (12) and second roll (14), adapted to unwind said web-like material (24) from said first roll (12) and second roll (14); said unwinding device also comprising deflection means (28) for deflecting said one-ply or two-ply web-like material (24), said deflection means being placed downstream of said first roll (12) and second roll (14), in order to deflect said web-like material (24) coming from said first roll (12) and second roll (14) and send it towards a joining mechanism (26) adapted to join together specific portions of said web-like material (24) respectively coming from said first roll (12) and second roll (14), said joining mechanism (26) being provided with at least one joining pad (32, 32′) adapted to retain said web-like material (24) by means of one or more suction systems (38, 38′), characterised in that a first of said support pins (16) is bound to said vertical column (18) at a height (H1), measured with respect to said base (20), that is different from the height (H2), measured with respect to said base (20), of the second of said support pins (16) bound on the opposite side of said vertical column (18). ### Claim 2 (depends on 1) The unwinding device (10) according to claim 1, characterised in that said support pins (16) are extended horizontally and in a substantially orthogonal direction with respect to a vertical plane passing through the longitudinal centre axis of said unwinding device (10). ### Claim 3 (depends on 1) The unwinding device (10) according to claim 1, characterised in that said joining mechanism (26) and said vertical column (18) are arranged in a central position along the longitudinal centre axis of said unwinding device (10). ### Claim 4 (depends on 3) The unwinding device (10) according to claim 3, characterised in that said first roll (12) and said second roll (14) are arranged on said support pins (16) of said vertical column (18) in a manner such that they are equidistant from said longitudinal centre axis of said unwinding device (10). ### Claim 5 (depends on 1) The unwinding device (10) according to claim 1, characterised in that said deflection means (28) comprise one or more return bars (30) that are tilted with respect to a horizontal plane. ### Claim 6 (depends on 1) The unwinding device (10) according to claim 1, characterised in that each of said unwinding mechanisms (22) is composed of at least one continuous belt (34) positioned below each of said rolls (12, 14). ### Claim 7 (depends on 6) The unwinding device (10) according to claim 6, characterised in that said continuous belt (34) is placed in rotation and in contact with the back of each of said rolls (12, 14) by means of a gear motor group (36), in order to facilitate the unwinding of said web-like material (24). ### Claim 8 (depends on 7) The unwinding device (10) according to claim 7, further comprising at least one sensor (42) adapted to signal the completed unwinding of said web-like material (24) from each of said rolls (12, 14). ### Claim 9 (depends on 1) The unwinding device (10) according to claim 1, further comprising at least one knife (40) adapted to cut the end of said web-like material (24) unwound from one of said rolls (12, 14).