Self-retracting imbibition chamber for cameras and method of making the same
AssigneePolaroid Corporation
InventorsEdwin H. Land, Albert J. Bachelder, Sarah H. Perry
Life of this patent
Estimating the term…
Abstract
A compact, self-retracting imbibition chamber for cameras in which the film is ejected just after exposure and passed through processing units which distribute processing fluid throughout the film unit. The apparatus includes a normally tightly coiled imbibition chamber which receives the sheet ejected from the processing rolls and retains it in a light-protected condition until it is sufficiently processed to allow it to be exposed to the light.
Claims11
In combination with a camera having a pair of processing rolls through which a film unit may be advanced for processing, a tightly coiled helix of springy opaque material having inturned film retaining flanges fluted with adjacent regions of said material to permit coiling without creasing, said coiled helix being mounted in said camera in front of said rolls with portions of said flanges spread from a projecting end flap of said helix to receive the end of a film unit passing out between said rolls.
Imbibition means for use with photographic apparatus of the type having apparatus for processing and advancing a film unit therefrom, said imbibition means comprising:
- a flexible structure resiliently structured to assume a configuration coiled lengthwise of itself when in an unstressed condition, said flexible structure including a first section arranged to overlie at least the exposed photosensitive surface of the film unit when said structure is uncoiled, and a pair of spaced apart flanges positioned to respectively overlie portions of the inside face of said first section immediately adjacent the longitudinal edges of said first section and respectively connected to the longitudinal edges of said first section so as to slidably capture the opposed longitudinal edges of the film unit as its leading edge is introduced into said coiled flexible structure causing said flexible structure to progressively uncoil, said structure thereby protecting the photosensitive surface of the film unit from actinic light while releasably retaining the film unit therewithin, said flanges and said longitudinal edges of said first section being fluted laterally of said structure to preclude undesirable creasing of said structure when in its coiled configuration.
A camera apparatus of the type comprising:
- a housing having a film exit slot therein;
- means for defining a film exposure plane within said housing;
- means for processing an exposed film unit and advancing the film unit from said housing through said film exit slot;
- and
- a flexible imbibition structure in fixed connection with respect to said housing and resiliently structured to assume a configuration coiled lengthwise of itself when in an unstressed condition, said flexible structure including a first section arranged to overlie at least the exposed photosensitive surface of the film unit when said structure is uncoiled as the film unit is advanced from said housing and a pair of spaced apart flanges positioned to respectively overlie portions of the inside face of said first section immediately adjacent the longitudinal edges of said first section and respectively connected to the longitudinal edges of said first section so as to slidably capture the opposed longitudinal edges of the film unit as its leading edge is introduced into said coiled flexible structure during said film advancement causing said flexible structure to progressively uncoil, said structure thereby protecting the photosensitive surface of the film unit from actinic light while releasably retaining the film unit therewithin, said flanges and said longitudinal edges of said first section being fluted laterally of said structure to preclude undesirable creasing of said structure when in its coiled configuration.
Dependencies are inferred from the claim text.