Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1982-07-26
1984-02-14
Petrakes, John
Winding, tensioning, or guiding
Coil holder or support
Spool or core
206395, 206409, 242 711, 242 717, B65H 1902
Patent
active
044311397
ABSTRACT:
A container for light-sensitive material is folded from a blank of thin opaque material. The blank has four rectangular panels hingedly connected so as to be foldable to form a generally rectangular tube with four sides and two open ends. A cap associated with each end of the tube closes the container in a light-tight manner. Interlocking structure is associated with the hinge connections for forming a tortuous light path to inhibit any light leakage through the material at the hinge connection from reaching the contents of the container. Besides the light-locking effect of the interlocking structure, it enhances cartridge strength in that all edges, when folded up, are double thickness of material. The end caps of the container may be blanked with the side panels with a hinge connection between each end cap and one of the side panels. To prevent light leaks, ridges are formed on the side panel and the end cap to form a tortuous path for any light which leaks through the blushed area.
REFERENCES:
patent: 2743009 (1956-04-01), Williamson et al.
patent: 3246742 (1966-04-01), Coe
patent: 3481457 (1969-12-01), Oberton et al.
patent: 3541052 (1970-10-01), Kirk
patent: 3613973 (1971-10-01), Jaeschke
patent: 4122945 (1978-10-01), Borzak
patent: 4235346 (1980-11-01), Liggett
patent: 4239164 (1980-12-01), Barnsbee et al.
Research Disclosure, vol. 150, Oct. 1976, pp. 26-27.
Barnsbee Clive D.
Decker Marvin G.
Eastman Kodak Company
Petrakes John
Sales Milton S.
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