Closable pocket for photographic laboratory work - has slot in top of one wall, which folds over so that slot can receive tongue formed by arc cut in other wall

摘要

One wall (2) of the pocket has a tongue (5) which is united with the wall at the side (6) of the tongue that is nearest the opening of the pocket. The other wall (3) has a region (8) which can be folded down onto the first wall and which has a slot (9) to receive the tongue.