Photocopying – Projection printing and copying cameras – Step and repeat
Patent
1997-12-16
1999-11-02
Metjahic, Safet
Photocopying
Projection printing and copying cameras
Step and repeat
355 67, G03B 2742, G03B 2754
Patent
active
059780681
ABSTRACT:
A reference mark member used in exposure equipment is protected from being contaminated. A cover assembly, which includes a shutter-like cover, can be selectively opened and closed over the reference mark member to protect the same. A driving system drives the cover between its open and closed positions. An electronic controller controls the operation of the driving system based on the operating state of the equipment. The cover assembly may also include an annular support for the cover which extends around the reference mark member to offer further protection for the same. Protecting the reference mark member prevents the contamination of the reference mark which could lead to an error in an alignment task for which the reference mark is used.
REFERENCES:
patent: 3245794 (1966-04-01), Conley
patent: 3844655 (1974-10-01), Johannsmeier
patent: 5521036 (1996-05-01), Iwamoto et al.
patent: 5675402 (1997-10-01), Cho
patent: 5760881 (1998-06-01), Miyazaki
Metjahic Safet
Nguyen Hung Henry
Samsung Electrics Co., Inc.
LandOfFree
Apparatus for protecting a reference mark used in exposure equip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for protecting a reference mark used in exposure equip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for protecting a reference mark used in exposure equip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2142996