Self developing photographic film assemblage

Abstract

Abstract A PHOTOGRAPHIC FILM ASSEMBLAGE OF THE SELF-DEVELOPING TYPE COMPRISING A PHOTOSENSITIVE LAYER ON ONE OF A PAIR OF SHEETS INCLUDING A RECTANGULAR AREA ADAPTED TO BE EXPOSED AND PROCESSED BY SUPERPOSING THE SHEETS AND ADVANCING THEM RELATIVE TO AND BETWEEN A PAIR OF JUXTAPOSED PRESSURE-APPLYING MEMBERS TO DISTRIBUTE A VISCOUS LIQUID PROCESSING AGENT IN A THIN LAYER BETWEEN THE SHEETS FROM THE LEADING EDGE OF THE EXPOSED AREA TO THE TRAILING EDGE THEREOF. THE ASSEMBLAGE INCLUDES SPACING LAYERS AT THE LATERAL MARGINS OF THE AREA, TAPERED IN THICKNESS FROM A MAXIMUM NEAR THE LEADING EDGE TO A MINIMUM NEAR THE TRAILING EDGE OF THE AREA. A PREFERRED EMBODIMENT SHOWN IS A SELF-DEVELOPING FILM UNIT COMPRISING TWO RECTANGULAR SHEETS SECURED IN FACE-TO-FACE RELATION BY A BINDING SHEET SECURED TO THE SURFACE OF ONE OF THE SHEETS AND HAVING MARGINAL SECTIONS FOLDED AROUND THE LATERAL AND TRAILING END EDGES OF THE SHEETS AND SECURED TO THE MARGINS OF THE OTHER SHEET. THE BINDING SHEET IS FORMED WITH A RECTANGULAR OPENING THROUGH WHICH A LAYER OF PHOTOSENSITIVE MATERIAL BETWEEN THE SHEETS IS EXPOSED AND/OR A VISIBLE IMAGE FORMED BETWEEN THE SHEETS IS VIEWED. THE BINDING SHEET INCLUDES A SECTION TAPERED IN THICKNESS FROM AT LEAST THE LEADING EDGE OF THE OPENING TO AT LEAST THE TRAILING EDGE OF THE OPENING FOR COOPERATING WITH THE PRESSURE-APPLYING MEMBERS TO CONTROL THE THICKNESS OF THE LAYER OF LIQUID AND IS FORMED OF A UNIFORMLY THICK SUPPORT AND A PIGMENT-CONTAINING COATING WHICH IS TAPERED IN THICKNESS.

Inventors

• 👤 E Land
• 👤 R Chen

Bibliographic Details