Photocopying – Contact printing – Light boxes
Patent
1989-07-03
1991-04-09
Moses, R. L.
Photocopying
Contact printing
Light boxes
355272, 355326, G03G 1500
Patent
active
050069004
ABSTRACT:
A transfer apparatus includes a transfer member, for example, a transfer drum with a line of small closely spaced laser drilled vacuum holes to hold a receiving sheet to the drum surface. To maintain the continuity of a transfer field but be free from clogging, the holes are narrow near the surface of the drum but wider as they extend deeper in the drum.
Conical holes are drilled in the drum by a laser. In one embodiment, a short focal length lens focuses a laser bear near the surface of the drum which beam spreads below the surface to form a conical hole.
REFERENCES:
patent: 3633543 (1972-01-01), Pitasi
patent: 3781105 (1973-12-01), Meagher
patent: 3832055 (1974-08-01), Hamaker
patent: 3900591 (1975-08-01), Kline
patent: 4080053 (1978-03-01), Friday
patent: 4403847 (1983-09-01), Chrestensen
patent: 4408866 (1983-10-01), Gustafson
patent: 4712906 (1987-12-01), Bothner et al.
patent: 4724458 (1988-02-01), Roy et al.
patent: 4740813 (1988-04-01), Roy
Research Disclosure, Dec. 1980, No. 200, p. 526. Disclosed by R. D. May and P. B. Wood.
Baughman Richard C.
Ellingham David J.
Fowlkes William Y.
Rubin Bruce J.
Stepanik Frank S.
Eastman Kodak Company
Moses R. L.
Treash, Jr. Leonard W.
LandOfFree
Transfer apparatus having vacuum holes and method of making such does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transfer apparatus having vacuum holes and method of making such, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transfer apparatus having vacuum holes and method of making such will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2038243