| 摘要 |
PROBLEM TO BE SOLVED: To produce a picture frame which can simply be composed by folding and inserting a single sheet made of paper, plastic, fabric or other foldable materials, without using adhesive and which is extremely lightweight, inexpensive, has a appearance and matches well with a work, etc., to be placed. SOLUTION: Lines to be folded like mountains and lines to be folded like valleys for a folding manner are printed on the sheet so that the picture frame can be composed and that the corners of a frame can be reinforced. The frame can be produced by folding and inserting the sheet in order.
|
