Title:
SHEET DISCRIMINATING SYSTEM AND IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JP3919291
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sheet discriminating system having improved discrimination performance and excellent in reliability and an image forming device by temporarily stopping a conveyed sheet, and reading a discrimination mark applied on the sheet.
SOLUTION: When a lever type sensor 42 in front of a resist roller 40 is turned on at a conveyance path section conveying an OHP sheet to an image formation section, it detects the arrival of the OHP sheet, and the OHP sheet conveyed to form a resist loop is stopped by the nip section of the resist roller 40. A mark on the OHP sheet is detected by a transmission type sensor 41 which is a discrimination mark reading means arranged near the nip section of the resist roller 40, and the surface or back face of the OHP sheet is discriminated. The discrimination mark applied to the OHP sheet is read out while the OHP sheet is stopped by the resist roller 40, the discrimination mark can be surely read out, and the transmission type sensor 41 is not required to be a high-performance one.
Inventors:
Akinori Tanaka
Application Number:
JP15609797A
Publication Date:
May 23, 2007
Filing Date:
May 30, 1997
Export Citation:
Assignee:
Canon Inc
International Classes:
B41J11/42; B65H7/14; G03G15/00; G03G21/00; (IPC1-7): B65H7/14; B41J11/42; G03G15/00; G03G21/00
Domestic Patent References:
| JP8324836A | ||||
| JP9030682A | ||||
| JP10236697A |
Attorney, Agent or Firm:
Kazunobu Sera
Hiroyasu Kanai
Mayuko Wakuda
Hiroyasu Kanai
Mayuko Wakuda
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