JPS59162072A - Printing paper cutting mechanism - Google Patents

Abstract

PURPOSE:To cut printing paper such as a rolled paper easily by simply press a key by a method wherein a cone shape cutlery element and a wedge shape cutlery element are provided to the tips of spokes of a daisy wheel of an electronic typewriter or the like which has a type wheel. CONSTITUTION:After the printing is finished, a special key for the paper cutting is actuated in the keyboard. Then an ink-ribbon is down and a carrier is transferred to the edge of the paper by line-feed and one of the cutlery elements 3b, 3c by which the paper is cut is selected. The selected cutlery element, for instance a cone shape element 3b, is transferred to the printing position and a printing hammer is operated. One operation of the printing hammer is performed every one pitch shifting of the carrier and, for instance, a period (.) shape cut line 24 can be formed across the rolled paper 21.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a print paper cutting mechanism for a daisy-wheel type printer, and more particularly, to a type wheel type printer having a blade-like element capable of cutting perforations or other cuts in the print paper. This paper pertains to a printing paper cutting mechanism for a daisy-wheel type printer embedded in a daisy-wheel type printer.

Prior Art In the past, in printing devices such as electronic typewriters having a type wheel, the printing paper was mainly of a predetermined size, and cutting the printing paper along perforations etc. was not given much importance. It wasn't. However, recently the paper used has diversified, especially roll paper etc.
Opportunities to print are increasing. Then, when cutting the printing paper, the operator used a cutter or the like after measuring the size in the vertical direction. As a result, there was a drawback that the burden on the operator was heavy.

Purpose The present invention has been made in order to improve the conventional drawbacks as described below.The present invention is constructed so that printing paper can be easily cut by simply pressing the printing paper cutting key. The purpose of the present invention is to provide a printing paper cutting mechanism for a daisy-wheel printer.

EXAMPLES The present invention will be described in detail below based on examples shown in the drawings.

1 to 5 illustrate one embodiment of the present invention. Fig. 1 shows the external appearance of a typewriter to which the present invention is applied, and there is no difference in appearance from the conventional typewriter. The platens 4 are arranged opposite to each other. As shown in an enlarged view in FIG. 6, the daisy wheel 3 has a blade-like element 3b shown as a conical projection at the tip of the spoke 3a.
and a wedge-shaped cutter element 3c.

FIG. 2 is an operation timing diagram of each element of the printer when the present invention is implemented. In the figure, symbol a indicates the leftmost position of the printing paper, symbol s indicates the rightmost position of the printing paper, and symbol C indicates the first printing position of the new page.

The actual printing paper cutting operation using the blade-like elements 3b and 3c as described above is controlled by a control circuit shown in FIG.

FIG. 3 is a block diagram illustrating specific information control and processing when implementing the present invention. The flow of information processing is as follows.

First, input information on the keyboard 1 is sequentially read by the keyboard (3) and the control device 12, and is processed by the central processing unit (hereinafter abbreviated as CPU) according to instructions from the control register 13.
Read at 14. The printer I6 is driven by the CPU 14 via the output port 15.

A printer for embodying the present invention is equipped with a paper edge detector 17. Each time the power is turned on or paper is replaced, the carrier is activated, and when detecting the left edge of paper, the value of carrier position counter 18 is stored in register A of 19. Similarly, when detecting the right edge of paper 11, the value of 18 is stored. 2
Transfer it to register B of 0. 11 is a reading port for type wheel position and other printer information.

Next, the actual cutting operation will be explained with reference to the timing chart shown in FIG.

That is, when a special key for cutting the paper is operated on the keyboard 1 when printing is completed, an input for cutting the paper is made as shown by reference numeral A in FIG. Then, a cutting execution flag is set in the control register 13 as indicated by symbol B.

(4) At the same time, when printing is completed, the position of the carrier is in the middle of the line, so line feed C is performed to feed the carrier and rear to the edge position of the paper. will be done.

Then, the selected blade-like element (for example, a circular knife) 3b is moved to the printing position, and the printing hammer is operated as shown by symbol E. The operation of the printing hammer is code F.
It is performed once for each pitch movement of the carrier shown in
For example, as shown by reference numeral 24 in FIG. 4, perforations 24 in the form of a period "." are formed across the roll-shaped printing paper 21.

In Fig. 4, the part indicated by numeral 25 is the printing space,
Reference numeral 22 is the left margin, and reference numeral 23 is the right margin.

If the operator wishes to abort the cutting operation midway through, he or she can do so by pressing a special key.

During the cutting operation, a paper cutting lamp d is lit.

Note that during the actual cutting operation, the platen is rotated until a value set in a printing digit register (not shown) is reached, and the cutting position of the printing paper is determined. The value of this print digit register can be set in advance by the operator, and the length of the print paper can be made constant.

In this way, the printing operation for cutting progresses, and when the value of the carrier position counter 18 matches the value of the register 19, the series of operations for cutting ends, and the carrier and platen are placed at the beginning of the page break. It is set at the printing position.

Incidentally, the ink ribbon is in a down state as shown by the symbol G in FIG. 2, and does not come into contact with the blade-like element.

Of course, when the underlined "-4" shaped element 3c is selected, the cutting operation is performed in the same manner. The perforation formed by this element is indicated by reference numeral 26 in FIG.

Note that the carrier feed pitch can be arbitrarily determined using a normal feed bit selector.

In this way, perforations for cutting the printing paper to a desired length can be formed by an operation similar to a normal printing operation, and the operator's work is greatly simplified.

As is clear from the explanation given below, according to the present invention, even when roll paper is used as printing paper, the typewriter can be used after creating a document by an extremely simple operation of just pressing a key. - The print paper can be cut into uniform sizes, and the unnecessary burden on the operator, which was conventional, can also be removed.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a perspective view of an electronic typewriter to which the present invention is applied, FIG. 2 is a timing chart diagram, and FIG. 3 is a block diagram of a control circuit.
4 and 5 are perspective views of roll paper with different perforations formed therein, and FIG. 6 is a perspective view of a knife-like element. 1... Keyboard 2... Carrier 3...
Daisy wheels 3b, 3c...Knife-like element 4...Platen 12...Keyboard control device 13.
...Control register]4...Central processing unit 17...Paper edge detector 18...Carrier position counter

Claims (1)

[Claims] a platen and a carrier that moves in the longitudinal direction of the platen; and a type wheel of a printing device having a print hammer and a type wheel; A printing paper cutting mechanism characterized by: