Photocopying – Contact printing – Step and repeat
Patent
1999-03-08
1999-11-30
Mathews, Alan A.
Photocopying
Contact printing
Step and repeat
355 26, 355 72, 355 75, G03B 2704
Patent
active
059952059
ABSTRACT:
The invention relates to a light exposure installation of a double-sided printed circuit plate through a first and a second artwork equipped with a location mark. It includes a first (10) and a second fixed supporting structure in a horizontal plane, a first and a second support of the first and second artworks (12), optical means for detecting the positioning errors between said circuit and said first and second supports, means for moving perpendicularly to its plane, one of said supports towards the other support, means (26, 28) arranged outside the unit made up of said supports and said circuit to maintain said circuit fixed in its plane with respect to said supporting structure; and means (20, 22) for moving independently said first support (12) with respect to said circuit and said second support with respect to said circuit depending on the detected positioning errors.
REFERENCES:
patent: 4827316 (1989-05-01), Brown
patent: 5272502 (1993-12-01), Saiki
patent: 5337151 (1994-08-01), Baxter et al.
patent: 5403684 (1995-04-01), Schroeder et al.
patent: 5548372 (1996-08-01), Schroeder et al.
Charbonnier Serge
Sorel Alain
Automa-Tech
Mathews Alan A.
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