US 4,395,721 A · Laser beam printer

Abstract

A laser beam printer in which latent images are produced on a light-sensitive drum through line scanning with a laser beam modulated with print information to be printed. The laser beam is modulated with the information to be printed in such a manner that the light sensitive drum is irradiated with the laser beam except for those portions which are to be printed. The line scanning is effected with the laser beam modulated in accordance with the print information in a non-superposed manner on one hand and on the other hand with the laser beam which is modulated by information synthesized from the printing information for every two adjacent line scanning so that these two adjacent line scannings are partially covered by the line scanning based on the synthesized information.

Claims4

Dependent claims

A laser beam printer in which a light sensitive member is scanned on a line base with a laser beam modulated with pattern data to be printed out, comprising:

first means for furnishing the pattern data on a single-line base;
second means receiving the pattern data from said first means for interposing synthesized data each between adjacent ones of said pattern data, said synthesized data being synthesized from the pattern data which preceedes to and succeed to said synthesized data, respectively;
and
third means receiving the output from said second means for scanning said light-sensitive member with the laser beam modulated with the output from said second means on the line base so that adjacent lines as scanned are partially superposed on each other.

1 more element

Dependencies are inferred from the claim text.

Laser beam printer

Life of this patent

Laser beam printer

Life of this patent

Abstract

Claims4