Film assembly including a hermetically sealed battery

• US 3,967,292 A
• Filed: 12/23/1974
• Issued: 06/29/1976
• Est. Priority Date: 12/23/1974
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Delahunt, Robert M.
• Primary Examiner(s): Hix, L. T.
• Assistant Examiner(s): O'Connor, E. M.
• Application Number:
  US05/535,206
• Time in Patent Office: 554 Days
• Field of Search: 354/174, 354/85, 354/202, 354/304, 354/354, 354/275, 136/111
• US Class Current: 396/360
• CPC Class Codes: G03B 17/26 Holders for containing light sensitive material and adapted to be inserted within the camera holders for X-ray films G03B42/04
• CPC Class Codes: G03C 8/46 characterised by the trapping means or gas releasing means
• CPC Class Codes: H01M 50/55 on the same side of the cell
• CPC Class Codes: H01M 50/555 Window-shaped terminals
• CPC Class Codes: H01M 6/12 with flat electrodes

Abstract

A photographic film assembly which comprises a cassette; a supply of photographic film disposed within the cassette; a battery positioned within the cassette which includes one or more cells containing an aqueous electrolyte possessing an ionizable ammonium salt, and means for hermetically sealing the battery positioned within the cassette to prevent volatile effluvia liberated by the battery from contacting said film units.

Claims

1. In a photographic film assembly which comprises, in combination:

a. a photographic film cassette including a withdrawal orifice positioned in a wall of the cassette through which a supply of photographic film is adapted to be selectively withdrawn;

b. a supply of photographic film positioned in the cassette for selective withdrawal from the cassette through the orifice;

c. a flat, planar, primary battery positioned in the cassette and including, in combination;

anode materials, sheet type separator elements, cathode materials and electrolyte combined with sheet type current collectors all combined to form a multicell structure providing contacts for external connection of said battery;

the improvement wherein said battery positioned in said cassette is hermetically sealed in sealing means to prevent evolution of gaseous materials from said battery, said sealing means comprising first and second laminar structures each of which comprise a thin fiberous sheet material bonded to a foil sheet material which is bonded to a non-conductive plastomeric sheet material having a heat activatable adhesive capability for providing effective sealing of said laminar assemblies about peripheral portions thereof and about said contacts of said battery.

2. A photographic film assembly of claim 1 wherein said heat activatable adhesive capability comprises a layer of a heat activatable adhesive overcoated on said plastomeric sheet material.

3. A photographic film assembly of claim 1 wherein said plastomeric sheet material comprises a polyester.

4. A photographic film assembly of claim 1 wherein said battery provides anode and cathode contacts disposed adjacent each other on one surface of the battery.

5. A photographic film assembly of claim 1 wherein said laminar assembly which provides sealing about said contacts comprises apertures integrated with a sealing insert for providing sealing of the laminar assembly about said contacts.

6. In a photographic film assembly which comprises, in combination:

a. a photographic film cassette adapted for enclosing a plurality of photographic film units arranged in stacked relationship and including a forward wall possessing a light-transmitting section to prevent exposure of the forwardmost film unit and a withdrawal opening in one wall of the container permitting selective withdrawal of the film units following exposure thereof;

b. a plurality of photographic integral negative positive, diffusion transfer film units disposed in stacked relationship within the cassette next adjacent the forward wall;

c. a flat, planar primary battery positioned in the cassette and including, in combination;

i. an anode;

ii. a cathode superposed substantially coextensive the anode;

iii. A battery separator positioned intermediate and extending at least coextensive the facing surfaces of the anode and the cathode; and

iv. an electrolyte disposed in contact with the facing surfaces of the anode and the cathode and including an ionizable ammonium salt all combined to form a multicell structure and providing anode and cathode contacts adjacent each other on one surface of said battery;

the improvement wherein said battery is hermetically sealed between first and second laminar structures each of which comprises a fibrous sheet material bonded to a foil sheet material which is bonded to a non-conductive, plastomeric sheet material having a heat activatable adhesive capability to provide effective sealing about the peripheral portions of said assemblies and about said contacts.

7. A photographic film assembly of claim 6 wherein said laminar assembly which provides sealing about said contacts comprises apertures integrated with a sealing insert for providing sealing of the laminar assembly about said contacts.

8. A photographic film assembly of claim 6 wherein said plastomeric sheet material comprises a polyester.

9. A photographic film assembly of claim 6 wherein the cassette includes spring means biasing the film units towards the forward wall and the battery toward the rear wall.

10. A photographic film assembly of claim 6 including first and second openings in the rear wall of the cassette, the first opening to permit conductor contact with the anode or cathode next adjacent the rear wall and the second opening to permit conductor contact with a conductor disposed in the container in contact with the electrode distal the rear wall.