Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ELECTROPHOTOGRAPHIC COPYING METHOD
Document Type and Number:
Japanese Patent JPS63132262
Kind Code:
A
Abstract:

PURPOSE: To form an image with an appropriate image tone by automatically controlling an exposure amount and/or a development bias voltage based on information about an original surface density grasped by a photodetecting means moving along an original surface so as to cross a scan direction and transferring an original.

CONSTITUTION: The photodetecting means 36 is moved along the original surface so as to cross the scan direction of the original 12 due to the relative movement between an exposure means and the original while they are relatively moving. The means 36 is moved while the exposure means is scanning, and hence light from the original surface is detected to grasp the optical photographic density of the original surface. By such scanning, an original density detection and scan such as tracking a ruled line or an underline can be evaded. Thus the original density is precisely detected to obtain an image with an appropriate image tone.


Inventors:
SAKAMOTO KOJI
TATSUMI SUSUMU
IMAI TSUTOMU
Application Number:
JP7262787A
Publication Date:
June 04, 1988
Filing Date:
March 26, 1987
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
RICOH KK
International Classes:
G03G15/00; G03G15/04; G03G15/043; (IPC1-7): G03G15/00; G03G15/04
Domestic Patent References:
JPS4853731A1973-07-28
JPS53134437A1978-11-24
JPS53138740A1978-12-04
JPS543546A1979-01-11
JPS5410743A1979-01-26
Attorney, Agent or Firm:
Toru Kabayama



 
Previous Patent: JPS63132261

Next Patent: JPS63132263