US 11,886,143 B2
Sheet laminator, image forming apparatus, and sheet laminating method
Keisuke Sugiyama, Kanagawa (JP); Tomohiro Furuhashi, Kanagawa (JP); Wataru Takahashi, Tokyo (JP); Ruki Midorikawa, Kanagawa (JP); Shinya Monma, Kanagawa (JP); and Sho Asano, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Keisuke Sugiyama, Kanagawa (JP); Tomohiro Furuhashi, Kanagawa (JP); Wataru Takahashi, Tokyo (JP); Ruki Midorikawa, Kanagawa (JP); Shinya Monma, Kanagawa (JP); and Sho Asano, Kanagawa (JP)
Filed on Dec. 2, 2022, as Appl. No. 18/061,232.
Claims priority of application No. 2022-003616 (JP), filed on Jan. 13, 2022.
Prior Publication US 2023/0221672 A1, Jul. 13, 2023
Int. Cl. G03G 15/20 (2006.01); G03G 15/00 (2006.01); B32B 37/00 (2006.01); B32B 41/00 (2006.01)
CPC G03G 15/6585 (2013.01) [B32B 37/0053 (2013.01); B32B 41/00 (2013.01); B32B 2037/0069 (2013.01); B32B 2250/03 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A sheet laminator configured to laminate a two-ply sheet in which two sheets are overlapped and bonded together at one end of the two-ply sheet and a sheet-shaped medium inserted between the two sheets of the two-ply sheet, the sheet laminator comprising:
a sheet feeder configured to feed the two-ply sheet;
a multi-feeding detector disposed downstream from the sheet feeder in a conveyance direction in which the two-ply sheet is conveyed, the multi-feeding detector being configured to detect multiple feeding of the two-ply sheet;
a fixing device disposed downstream from the multi-feeding detector in the conveyance direction, the fixing device being configured to fix the two-ply sheet by application of heat and pressure;
an ejection device disposed downstream from the fixing device in the conveyance direction, the ejection device being configured to eject the two-ply sheet that has been fixed by the fixing device;
a purging portion disposed at a position different from the ejection device, the purging portion including a retracted sheet conveyance passage branched at a point upstream from the fixing device in the conveyance direction;
a passage switcher disposed upstream from the fixing device and the purging portion in the conveyance direction, the passage switcher being configured to switch a conveyance passage of the two-ply sheet to the fixing device or to the purging portion; and
circuitry configured to, in response to detection of multiple feeding of the two-ply sheet, convey the two-ply sheet to the purging portion and retry sheet feeding with another two-ply sheet.