GB292694A - Improvements in or relating to photographic film-packs - Google Patents

Abstract

292,694. Storr, B. V., and Ilford, Ltd. March 25, 1927. Change-boxes, selfcontained. - A film pack case is formed from two interfitting parts each formed of a bent metal blank, the seams at the corners being rendered light-tight by opaque paper liners. The front part, Fig. 3, comprises an apertured front wall 22 and an end wall 34, while the back part, Fig. 4, comprises a rear wall 10 and opposite end wall 16, side members 30, 15 being formed in each case. Each part is provided with locking lugs 28, 18 formed by extensions of the end wall bent at right angles 'thereto to engage and overlie the other part when the two parts are slid into engagement as shown in Fig. 9. The end wall 34 is provided with a notch 24 for the passage of the film tabs. The seams in the upper part are rendered light-tight by a paper liner 36, Fig. 3, secured by means of tabs 38, and the lower seams by a paper apron 40 having a flap 42, Fig. 9, which passes through the exposure opening and is then pasted to the apron to hold it in place. The apron is also provided with tabs 44, 46 to seal the seams. The pack may be supported on a resilient pressure plate as described in Specification 271,913 with the tabs placed in the recess 24. A light trap may be provided formed of a sheet of opaque paper 54, Figs. 7 and 9, slotted at 56 for the passage of the film tabs, folded at or near the slot, and provided with a strip of velvet 58 on the inner side of the paper. Small pieces of card 60, or a continuous strip of card when the fold is not at the slot 56, act as a stop for the edges of the films when they are pulled round to the back of the pack.