Dental film packet improvement and method for effecting same

Details Dental film packet improvement and method for effecting same Dental film packet improvement and method for effecting same

1991-01-24

1991-12-31

Howell, Janice A.

X-ray or gamma ray systems or devices

Photographic detector support

Dental

378167, 378169, A61B 614

Patent

active

050777793

ABSTRACT:
A convenience-enhancing improvement upon a known dental film packet (FP) having sensitized film and protective opaque sheets (10 and 12, 14) enclosed by an openable light-tight envelope (16), one of whose opaque sheets (12c) covers substantially all of the film sheet (10) when both (12c and 10) are partially withdrawn after its envelope (16) has been opened, rendering the film sheet (10) inconvenient to grasp and remove alone. In a first embodiment, the improvement comprises shortening said one opaque sheet (12c') so that it (12c') remains sufficiently protective without covering a graspable end portion (10L') of the film sheet (10'). In a second (preferred) embodiment, the opaque sheet (12c") is shortened to such an extent that it (12c") covers only an opposite end portion (10t") of the film sheet (10"), and an overlying metal-foil/black-paper laminate (14") cooperates therewith (12c") to lend further protection but remains inside the envelope (16"), so as not to cover said graspable end portion (10L"), as the film sheet (10") is withdrawn; this arrangement permits the packet (FP") to have a thinner and more uniform overall thickness.

REFERENCES:
patent: 3443093 (1969-05-01), Lindenmuth et al.
patent: 4831643 (1989-05-01), Tanaka
patent: 4912740 (1990-03-01), Liese, Jr.
patent: 4922511 (1990-05-01), Gay

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