Photographic medium cartridge with chemically activated status i

Details Photographic medium cartridge with chemically activated status i Photographic medium cartridge with chemically activated status i

1996-12-19

1998-02-10

Blankenship, Howard B.

Photography

Camera detail

Detachable or removable film holder unit

116206, G03B 1726

Patent

active

057179727

ABSTRACT:
A cartridge (10) of photographic medium includes a housing (14-24) having an interior volume (15); an exit slit (26) from the interior volume to an exterior of the housing; a photographic medium element (12) enclosed within the interior volume; an indicator (36-44) supported by one of the housing and the medium element, the indicator being responsive to a liquid reagent to change color and provide a visible indication of a status of the medium element; a source (46-52; 72-76; 90; 112) of the liquid reagent supported by the one of the housing and the medium element; and means (32, 34, 54-62; 778-86; 94-100; 22, 26, 28, 110) for causing flow of the reagent to the indicator upon movement of the medium element through the exit slit, whereby the indicator will change color and indicate the status. An indicator apparatus for mounting on a cartridge and a photographic medium supporting an indicator and source of reagent also are disclosed.

REFERENCES:
patent: 3463532 (1969-08-01), Chidley et al.
patent: 4511052 (1985-04-01), Klein et al.
patent: 4685579 (1987-08-01), Stapleton
patent: 4883182 (1989-11-01), Hughes
patent: 5278600 (1994-01-01), Takahashi et al.
patent: 5285227 (1994-02-01), Lawther et al.
patent: 5351101 (1994-09-01), Janson, Jr.
patent: 5517268 (1996-05-01), Stephany
patent: 5587756 (1996-12-01), Mehra et al.

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