Photographic film packet and light locking element

Details Photographic film packet and light locking element Photographic film packet and light locking element

1994-03-30

1996-04-23

Mathews, A. A.

G03B 1726

Patent

active

055108695

ABSTRACT:
An improved photographic film packet (P) has a photosensitive film sheet (F) , an elongate carrier sheet (C), a light shielding envelope and a transversely disposed element (30) secured to the carrier (C). The light shielding envelope (E) has a closed leading end portion and a closable trailing end portion (46). The trailing end portion includes lateral edge portions 46a, 46b) The transversely disposed element (30) or clip, being substantially U-shaped, has a vertex (30v) with an interior wall (33) that enables at least the lateral edge portions (46a, 46b) of the trailing end portion (46) of the envelope E to abut thereagainst for closing the trailing end portion (46). In another embodiment of the invention, transversely disposed element (30) is also provided with inward-facing dimples (31d) on at least one segment of first and second flange portions (30a,30b) that project from the vertex (30v). The inward-facing dimples (31d) are positioned for compressive engagement of the first and second opposing walls of the envelope E to further prevent the ingress of light therein.

REFERENCES:
patent: 818543 (1906-04-01), Leistenschneider
patent: 3586501 (1971-06-01), Norquist et al.
patent: 4725865 (1988-02-01), Hoffman
patent: 4821054 (1989-04-01), Armbruster et al.
patent: 4821055 (1989-04-01), Loose et al.
patent: 4994835 (1991-02-01), Loose et al.
patent: 4994836 (1991-02-01), Loose et al.
patent: 5223381 (1993-06-01), Hara et al.
patent: 5337111 (1994-08-01), Robertson

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