| 摘要 |
PCT No. PCT/FI95/00408 Sec. 371 Date Jan. 28, 1997 Sec. 102(e) Date Jan. 28, 1997 PCT Filed Jul. 31, 1995 PCT Pub. No. WO96/04145 PCT Pub. Date Feb. 15, 1996A knife for cutting a fold in paper, especially designed for opening an envelope. At least one end of the knife has two adjacent body walls (6) with a blade portion (3) placed between them and guiding sections (7, 10) in the body to guide the fold while cutting. At least body walls (6) of the knife are made of transparent material or furnished with a control hole (12) to facilitate arrangement of tip (2) into a starting position for cutting.
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