Negative film mask apparatus with magnetic properties

Details Negative film mask apparatus with magnetic properties Negative film mask apparatus with magnetic properties

1996-01-19

1998-03-17

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Detailed holder for original

G03B 2762

Patent

active

057293309

ABSTRACT:
A magnet is provided on either a negative film mask or a negative film mask table of a negative film mask apparatus, and a magnetic material is provided on the other of these. When the negative film mask in which a negative film has been loaded is placed on the negative film mask table, the negative film mask is held in place by a magnetic force. The negative film mask apparatus is provided with a stopper. The stopper is adapted to press a closely-contacting member against a sliding surface of the negative film mask table when necessary, thereby preventing the negative film mask from sliding. The closely-contacting member is made of a material such as rubber so that it can closely contact a sliding surface of the negative film mask table. Further, a magnetic member is included in the stopper. The stopper generates a large frictional force utilizing pressing force and magnetic force. Therefore, the negative film mask can be stably held in place in a state in which the negative film mask and the negative film mask table are inclined. Also, the large frictional force makes it possible to stably hold the negative film mask in place against a magnetic force which acts on the negative film mask in a horizontal direction.

REFERENCES:
patent: 3984186 (1976-10-01), Momose et al.
patent: 4396281 (1983-08-01), Okabe et al.
patent: 5162926 (1992-11-01), Yeadon et al.
patent: 5343273 (1994-08-01), Yamamoto et al.

Affiliated with

Also associated with

Rating

Negative film mask apparatus with magnetic properties does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Negative film mask apparatus with magnetic properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative film mask apparatus with magnetic properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-962716