JPH0226719Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an envelope opening device that cuts and opens an envelope by pressing it against the envelope when opening the envelope.

[Prior Art] If an envelope is opened by tearing one end of the envelope by hand, the documents inside are often torn, and it is not convenient to store the envelope.

Scissors are often used, but they can also tear the contents, and opening a large number of packages can cause them to tear, reducing efficiency.

Automatic openers are good, but they require a lot of space and are not suitable for the general public.

There are hand-held opening devices that have thin grooves in thick paper and a sharp blade attached diagonally to the groove, but they quickly lose their sharpness and are not suitable for opening envelopes.

Small cutting machines are also good, but they are dangerous and take up a lot of space, so they are not suitable for offices.

The cutter knife is easy to use, but if you don't put a mat under it, it will damage the desk, and the tip of the blade always applies strong pressure to the underside, so it tends to lose its sharpness.

[Problems with the prior art] Envelope openers with a thick paper slit or a holder with a blade attached at an angle of 30 to 60 degrees have been widely used as hand-held envelope openers, but the sharpness is limited. It fell off quickly, so it is no longer used much.

I can't find any small hand-held opening device that can easily open even bulging envelopes.

[Problems to be Solved by the Invention] Therefore, the problem to be solved by the present invention is to provide a small and effective hand-held envelope opening device.

[Means for Solving the Problems] (Summary) In order to solve the above problems, the envelope opening device according to the present invention has a flat blade with the same length as the fold length inside the bi-folded sheet, and a flat blade at the tip of the blade. It is characterized by the fact that the cutting edge line is aligned with the crease so that it does not stick out.

(Structure) In the present invention, a blade tip portion 5 of a linear blade portion 4 having the same length as the fold length is attached to the inside of the cover 2 which is made of a thin sheet having some elasticity that is molded and folded into two. A flat blade 1 is fixed inside a cover 2 while bringing the blade edge close to the crease so as not to protrude outside.

The blade body 1 is desirably a flat, thin blade with a thickness of 2 mm or less, ideally from 0.4 mm to 0.6 mm, and has a cutting edge portion 4 on one side or on both symmetrical sides.

The angle of the blade tip 5 is 140 degrees or less, ideally 60 degrees.
A 90 degree angle is best, and it is easier to use if both ends are at the same angle.

The cover 2 is made by punching or cutting a slightly elastic thin sheet of paper or vinyl chloride, and folding the sheet in two. The thickness of the sheet is 1
mm or less, ideally from 0.3 mm to 0.6 mm, and when folding in half, the fold must not bulge on the inside.

[Operation] By holding the opening device of the present invention between the fingertips and drawing a line while applying pressure to the envelope on the desk at an angle of about 40 degrees to 60 degrees with the cutting edge portion 4, it is possible to cleanly open one side of the envelope surface.

[Example] Hereinafter, examples will be shown and specific products of the invention will be described.

(Example 1) Figures 1 and 2 show a rectangular blade with a thickness of 0.4 mm inside an octant-shaped cover 2 made of double-folded Daruma-shaped cut paper with a thickness of 0.4 mm. 1 along with the blade edge 4 pressed against the inside of the cover fold 3,
At first, the blade tip 5 is fixed so that it cannot be seen.

Since the blade tip 5 is sufficiently covered, it has good durability and is also highly safe.

(Example 2) In the case shown in FIGS. 3 and 4, a trapezoidal blade 1 with a thickness of 0.6 mm is replaced with a rectangular blade with a thickness of 0.3 mm with rounded corners.
Cover 2 made by folding a mm polypropylene sheet into two
The blade body 1 is glued to the cover 2 while the blade edge part 4 is folded inside. Since this resin sheet has strong abrasion resistance, it can be used for quite a long time. In addition, the thick blade is stable and comfortable to use.

(Example 3) The razor blade shown in Figs. 5 and 6 is a double-edged razor blade with a thickness of 0.2 mm wrapped in a slightly elastic leather cover 2 with a thickness of 0.3 mm. The length of the section 4 is the same as the length of the cover fold 3.

The leather for Cover 2 should be slightly hard.

This type of blade has four blade tips 5, so it can be used for a long time.

Also, since it is thin, it can be easily carried around if used as a notebook holder.

[Effects of the invention] As described above, the product of the present invention can be easily opened by anyone, anywhere, without damaging the documents inside. Particularly thick envelopes can be opened by swiping near the edges.

The tip of the blade hardly sticks out, so you won't get hurt even if you put your finger on it.

Also, since it is thin and light, it is easy to carry and can be easily cut out from newspapers, etc.

Moreover, since it is easy to manufacture, it can be provided at a low price.

[Brief explanation of drawings]

1, 3, and 5 are front views of the envelope opening device according to the present invention, and FIGS. 2, 4, and 6 are sectional views of the aforementioned drawings, respectively. 1...Blade body, 2...Cover, 3...Cover crease, 4...Blade tip, 5...Blade tip.

Claims (1)

[Scope of utility model registration request] A cover 2 is formed by folding a slightly elastic thin sheet of paper, resin, etc. into two, and a cutting edge portion 4 of a thin blade body 1 has a linear cutting edge length that is the same length as the folded portion of the cover 2. In this envelope opening device, a blade 1 is fixed to the cover 2 along the inner fold of the fold part 3 of the cover 2, so that the blade tip 5 does not protrude outside the cover 2.