JPS57161762A - Bicolor printer - Google Patents

Bicolor printer

Info

Publication number
JPS57161762A
JPS57161762A JP56046911A JP4691181A JPS57161762A JP S57161762 A JPS57161762 A JP S57161762A JP 56046911 A JP56046911 A JP 56046911A JP 4691181 A JP4691181 A JP 4691181A JP S57161762 A JPS57161762 A JP S57161762A
Authority
JP
Japan
Prior art keywords
potential
photoreceptor
scans
surface potential
character
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56046911A
Other languages
Japanese (ja)
Inventor
Mitsuo Yamashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Computer Basic Technology Research Association Corp
Original Assignee
Computer Basic Technology Research Association Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Computer Basic Technology Research Association Corp filed Critical Computer Basic Technology Research Association Corp
Priority to JP56046911A priority Critical patent/JPS57161762A/en
Publication of JPS57161762A publication Critical patent/JPS57161762A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Printer (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To obtain an invariably stable bicolor image by providing a potential sensor which measures the surface potential of a photoreceptor right after an exposure part, and controlling scanning light so that the surface of the photoreceptor has an intermediate potential by irradiating the surface with the scanning light uniformly right before the start of printing. CONSTITUTION:Right after a photoreceptor 2 is rotates for the start of printing, the surface of the photoreceptor 2 is irradiated uniformly with laser light from a semiconductor laser 5 and the surface potential at this time is inputted through a sensor 16 to a controller 17 to compares an input with a target voltage level V2 with the measured potential, thereby performing control so that the measured potential is equal to the voltage level V2. When the larser light scans a no- character part 30, the surface potential is adjusted to the V2, but when it scans a black character A28, an optical output is set to 0 and the surface potential is held at the V1; when it scans on a red character B29, the optical output is increased and the surface potential is set to a V3, forming electrostatic latent images 28' and 29' on the photoreceptor 2.
JP56046911A 1981-03-30 1981-03-30 Bicolor printer Pending JPS57161762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56046911A JPS57161762A (en) 1981-03-30 1981-03-30 Bicolor printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56046911A JPS57161762A (en) 1981-03-30 1981-03-30 Bicolor printer

Publications (1)

Publication Number Publication Date
JPS57161762A true JPS57161762A (en) 1982-10-05

Family

ID=12760528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56046911A Pending JPS57161762A (en) 1981-03-30 1981-03-30 Bicolor printer

Country Status (1)

Country Link
JP (1) JPS57161762A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01189663A (en) * 1987-12-10 1989-07-28 Xerox Corp Highlight color imaging apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53115238A (en) * 1977-03-17 1978-10-07 Ricoh Co Ltd Two-color electrophotographic copying method
JPS5518667A (en) * 1978-07-27 1980-02-08 Minolta Camera Co Ltd Stabilization method of image density

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53115238A (en) * 1977-03-17 1978-10-07 Ricoh Co Ltd Two-color electrophotographic copying method
JPS5518667A (en) * 1978-07-27 1980-02-08 Minolta Camera Co Ltd Stabilization method of image density

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01189663A (en) * 1987-12-10 1989-07-28 Xerox Corp Highlight color imaging apparatus

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