Printing plate exposure apparatus for recording image data spira

Details Printing plate exposure apparatus for recording image data spira Printing plate exposure apparatus for recording image data spira

1997-05-29

1999-11-02

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347262, 358299, 1014631, B41J 2435, G01D 1524, H04N 121, B41C 105

Patent

active

059780100

ABSTRACT:
Distortions, wherein a recording image is inclined relative to a printing plate, are removed when image data from a computer are recorded spirally in recording bands, having a predetermined band width, of a plurality of picture elements on the printing plate which is wound on a drum. Printing plate exposure apparatus comprises the printing plate being wound spirally on the drum such that an extension line of a side edge line of the printing plate is shifted a band width after one drum revolution. The printing plate exposure apparatus further includes: an exposure unit for recording the image data in the recording bands on the printing plate; a moving mechanism for moving the exposure unit by one band width along a drum axial direction relative to the drum during one revolution of the drum; and a timing mechanism for adjusting a band recording start position of the image data for each rotation of the drum so as to set a top edge line of the recording image parallel to a top edge line of the printing plate.

REFERENCES:
patent: 4819018 (1989-04-01), Moyroud et al.
patent: 4822151 (1989-04-01), Tatsuno et al.
patent: 5550574 (1996-08-01), Dillow

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