Apparatus for holding a photosensitive sheet in a film package with an inflatable bag

• US 3,327,115 A
• Filed: 10/12/1964
• Issued: 06/20/1967
• Est. Priority Date: 10/12/1964
• Status: Expired due to Term

• Current Assignee: Philip D. Bartlett
• Original Assignee: Philip D. Bartlett
• Inventors: Bartlett, Philip D.
• Application Number:
  US04/403,175
• Time in Patent Office: 981 Days
• US Class Current: 378/187
• CPC Class Codes: G03B 17/52 of the Land type

Claims

1. APPARTUS FOR HOLDING A SHEET OF PHOTOSENSITIVE MATERIAL DURING EXPOSURE THEREOF, SAID APPARATUS COMPRISING IN COMBINATION:

(A) A CUT FILM HOLDER HAVING A FRONTAL EXPOSURE OPENING AND A SURFACE REARWARDLY OF SAID OPENING FOR SUPPORTING SAID PHOTOSENSITIVE SHEET DURING EXPOSURE;

(B) A FLEXIBLE SHEET ELEMENT COMPRISING ONE WALL OF AN ENCLOSED BAG ARRANGED IN COVERING RELATION TO SAID EXPOSURE OPENING;

(C) MEANS FOR SELECTIVELY MOVING SAID SHEET ELEMENT TOWARD AND AWAY FROM SAID SURFACE;

(D) MEANS FOR APPLYING POSITIVE AND SUBSTANTIALLY UNIFORM AIR PRESSURE TO SAID SHEET ELEMENT ON THE SIDE THEROF OPPOSITE SAID SURFACE IN RESPONSE TO MOVEMENT OF SAID SHEET ELEMENT TOWARD SAID SURFACE, WHEREBY SAID PHOTOSENSITIVE SHEET IS ENGAGED BETWEEN SAID SHEET ELEMENT AND SAID SURFACE AND URGED INTO CONTINUOUS CONTACT WITH SAID SURFACE;

(E) MEANS FOR INFLATING SAID BAG IN RESPONSE TO MOVMENT OF SAID SHEET ELEMENT TOWARD SAID SURFACE, THEREBY CREATING SAID AIR PRESSURE;

AND (F) MEANS FOR DEFLATING SAID BAG IN RESPONSE TO MOVMENT OF SAID SHEET ELEMENT AWAY FROM SAID SURFACE.