DE2260329A1 - PRINTING DEVICE - Google Patents

Description

Applicant; Societe d ¹ ApplicationsGenerales d'Electricite et de Mecanique (abbreviated SAGEM) 6 avenue d'Iena
"■ - Par is I6 ^e -. France

Printing device

The invention relates to a printing device for a Printing machine for successive printing of letters with or without a ribbon; with which on a printing document columns of dots that belong to a letter of a series of characters, with Can be printed with the help of movable printing elements that can be adjusted along the line of characters Write head are arranged. This is a printing machine with which the. A book- , would be printed out, individual dots. .,

In the previously known printing machines of this type. Push pins or push elements are in rows or arranged in columns and hit directly or with the interposition of a ribbon on a back

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document. The print head of these machines has _Λ,. because of the space required by the guides for the printing pins, relatively large dimensions in the direction of the row of letters to be printed, so that several of the letters printed last are covered by it when it prints a new letter. There are also known printing machines of the type mentioned, in which a temporary relative adjustment of the.; to be printed paper opposite the writing head in a direction perpendicular to the row between _; , see two printing steps being made * s <?. that j all letters of the series that have already been printed are visible. These printing machines have ^ n _Λ . however, a complicated structure. In addition, in the case of high-speed printing machines _{, the operator sees;} the last printed letter inconsistent and therefore poor.

The invention is based on the object, while avoiding the disadvantages mentioned above To train printing device of the type mentioned above so that a letter last written always remains visible, which makes the work of an operator much easier.

The object set is achieved according to the invention with a printing device which is characterized in that is that the Lärigenüntefeschied between one, Writing step of the writing head and the width of a letter is greater than the width of the guide part on the side of the letters already printed

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in the area of the end of the guide part facing the printing substrate, such that the writing head in its rest position, in which it stands in front of the position of a letter to be printed, the last one printed letters visible. The letter printed last remains while you are pressing of the next letter permanently visible.

Details of the invention emerge from the following description in conjunction with the drawing, on the one embodiment of the subject matter of the invention is shown more or less schematically.

Show in detail:

Fig. 1 is a perspective view

the printing device;

Fig. 2 is a partial section through the front

direction along the line I-I in Fig. 1.

In Fig. 1, the pushers 2a-2g of the printing elements, a sheet 11 to be printed as a printing pad, the end section 9 of the relatively long guide part for the printing elements, the electromagnets 5 and 5 ^f for actuating the printing elements and the movable armatures 6a-6g of these Electromagnet shown. An ink ribbon 10 is moved continuously or stepwise over rollers 15a, 15b, 15c and 15d by means of drive means not shown and not belonging to the invention. The seven printing elements, which are made up of

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of the arranged blades extend inside the guide part 9. The guide part is angled in the direction of its end opposite the sheet 11 ₍ and its angular side, which is linkji to the letters already printed, forms an angle of almost 90 with the sheet 11. This arrangement can be seen from Fig. 2. The pressure elements are blades arranged one above the other, and the pressure impact is carried out, for example, at the level of the pressure element 1a. The ink ribbon 10 rests against the two outer surfaces 9a and 9b of the guide part 9. The guide part is pointed so that that its outer side 9a runs almost perpendicular to the sheet 11, while the outer surface 9b runs at a small angle to this sheet 11. The ink ribbon 10, which is shown in Fig. 2 with a dot-dash line, is also in front of the calibration opening of the guide part 9, through which the ends of the actuated pressure elements emerge, as can be seen from FIG the ribbon 10 so in the immediate vicinity ate outer end 13a of the printing element 1a. The letter printed last is denoted by the reference number 16a and the letter printed before it is denoted by the reference number 16b. Due to the special design of the printing device, the letter 16a printed last remains visible to an operator of the printing machine after it has been printed.

In its rest position, the writing head is always in front of a point to be newly printed, that is, in front of it the position of the next letter to be printed.

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According to the invention, the difference in length between a writing step of the writing head, which is currently standardized to a value of 2.54 mm and the width of a letter, which is 1.8 mm, is greater than the width of the guide part on the side of the letters already printed, including the thickness of the ribbon in the area of the end section 9 of the guide part in close to the sheet 11. An operator can, in other words, continuously and without delay, check the text that you are going to print in the. Printing press because the long guide part does not interfere with the created viewing angle.

The invention can also be applied to printing machines. in which the printing elements are directly on, special color-releasing paper without. Liner hit a ribbon. In such a machine, there is no need for the ribbon 10 and the. E ± nrich ~ instructions for transporting this ribbon. Otherwise, the printing device is such a printing machine as shown in FIGS. 1 and 2, in this case the advantage no.ch is greater because the area of vision otherwise covered by the thickness of the ribbon is also released.

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Claims (1)

P 2027 - 6 - Claims f 1. J printing device for one printing machine for successive Printing of individual letters with or without a ribbon, with which on a printing surface Columns of points belonging to the letter of a series of letters with the help of movable ones Printing elements are printed in a print head that can be adjusted along the line of characters are arranged and slide in a guide part of this writing head, characterized in that the difference in length between a writing step of the writing head and the width of a letter (16) is larger than the width of the guide part (8/9) on the side of the letters that have already been printed (16a, 16b) in the area of the end section (9) of the guide part facing the printing substrate (11) (8/9), in such a way that the writing head is in its rest position, in which it is in front of the point of a letter to be printed, the last printed letter (16a) is visible. 2 · Printing device according to claim 1, characterized in that that the end section (9) of the guide part (8/9) in the vicinity of the printing pad (11) is tapered to form an angle, one leg of which forms an angle of approximately 90 with that section of the printing substrate (11) which bears the letters already printed, whereby the last letter printed becomes visible. - 7 -309845/0774 3. Printing device according to claim 1, having a Ink ribbon, characterized in that the ink ribbon is attached to the angular surfaces (9a, 9b) of the guide part (8/9) and also covers a calibration opening in the guide part, in which the Ends (13a) of the pressure elements are arranged aligned with one another in their rest position. 4. Printing device according to claim 1, with electromagnets (5) which are arranged behind the guide part (8/9) away from the printing pad and actuate the printing elements, characterized in that the guide part is accommodated in a housing which is sufficiently long, to an operator of the printing machine
Allow permanent viewing of the last printed letter. 3098AB / 077A