DE2319438A1 - PRINTING DEVICE - Google Patents

Description

DIp! .-! Ng. Heinz Lesw, patent attorney D-8 Mündisn 81, Cosimostroije 81 · leiefoo: (CSU) 93r-3? 0

Kabushiki Kaisha Suwa Seikosha

Tokyo / Japan _{L 10} . _{036 / F1 / ho} .

Shinshu Seiki Kabushiki Kaisha

Nagano-ken, Japan

Printing facility.

The invention relates to a printing device with a continuously moving printing type carrier and on specific position in the front of the types under the interposition of ink ribbon and paper to be printed Print hammers.

The fastest possible, so-called flying, pressure the distance between the types of printing, the paper, the ink ribbon and the printing hammer end must not be allowed chosen too large. The hammer must be brought into the pressure position at considerable speed, so that a clear, indistinct print image results. This endeavor results in a correspondingly narrow one Arrangement of the ribbon and the paper to be printed between the type carrier and the printing hammer lever ends. This can lead to the type carrier also attacking the ink ribbon or the paper outside of the printing times. Is the ribbon between the paper to be printed and the type carrier and is it a narrow design of the ribbon, as it is used, for example, in connection with typewriters, so the ribbon can hook onto the types and be taken away. There is still an unpleasant appearance in that the continuously transported paper to be printed along the ribbon outside of the printing times

309844/0460

Dipl.-Ing. Heinz Lesser, Potontonwolt D — 8 Munich 81, Cosimoslrcifjo 81 · Telufon: (GSTi) 9 & 3K7Ö

slides and thus experiences soiling.

With the present invention, a printing device of the type mentioned is to be made available, in which at least one of the aforementioned difficulties is avoided. So it should at least take the Ribbon due to the printing types or the contamination of the paper to be printed by abrasive printing types or can be avoided by grinding along the ribbon, depending on the arrangement.

According to the invention, this is achieved by at least one Aperture arranged between the printing hammers and the printing types. . ν.

The term aperture here describes a device that ensures that a Distance between the printing types and the ink ribbon and / or the ink ribbon and the paper to be printed and / or also the paper to be printed on and the types of printing. In a preferred embodiment, this is a Device which has a recess for each printing type row and which, in a preferred embodiment, is in the direction of movement the print hammer is elastically resilient in the printing position. In this way it is possible to print even thicker ones Paper or a multitude of parallel leaves, which form print-throughs next to the original, to be printed cleanly L.

In a particularly preferred embodiment, both between the ribbon and the paper to be printed and between

■ 'i

the type of printing and the respectively adjacent element, i.e. i the ribbon or the paper, bezels arranged. In the end it would still be conceivable under appropriate conditions, also between the hammer lever ends to be printed and the Provide a screen in each adjacent element.

The inventive device allows a narrow Using ribbon without the risk of

30984470460

D; ₍ ;! .- lng. Heinz Uwof, Pak-ntcmwait D ~ 8 Mündicr. SI, Cosimaslrafje 81 · Telephone: (CSIl) 983320

that this ribbon is taken along with the printing types.

The invention is explained in more detail with reference to the examples shown schematically in the accompanying drawing. Show it:

1 shows a sketch to illustrate the disadvantages of the prior art;

2 shows a perspective view of an embodiment according to the invention;

Fig. 3 is a side view of the embodiment according to Fig. 2. '"

Fig. 1 shows a type carrier which is designed as a drum is, i.e. on the outer surface of this drum there are printed symbols representing letters or the like 1'. At one point on the circumference of this drum there is a print hammer 5, which can be moved in the direction of the outer surface of the drum. Between this Print hammer 5 and types 1 'on the outer surface of the print drum are an ink ribbon 6 and one to be printed Paper 9. Since there is a special guide for both the ribbon 6 and the paper 9 to be printed on is absent, there is a risk that the paper 9 will drag along the ink ribbon 6 outside of the printing times and thus becomes dirty. On the other hand, the types 1 'can drag along the paper 9 to be printed. In any case you get an unclean print.

The ink ribbon 6 can also be arranged between the printing types I ¹ and the paper 9 to be printed. If a narrow, easily available ink ribbon were used here, there is a risk that the ink ribbon ^{will be carried along by the printing types I 1} in the direction of movement of the drum.

Are you dealing with a two-tone ribbon? - what should be possible according to the invention - so exists

3 09844/0460

Dipl.-lng.Hem2 Lesser, Polontor.wall D-S Mundien 81, Coiimaslrofje 81 · Telephone: (03Π) 98 3820

at least the risk that a wrong color print will be created due to the removal of the ribbon.

FIGS. 2 and 3 show an exemplary embodiment of the printing device _r provided according to the invention in which the aforementioned disadvantages do not occur.

Symbols for letters or, in the case shown, numbers I ¹ are arranged on the outer surface of a continuously rotating drum 1. The drum 1 rotates around a shaft 2 on which an actuator device 3 is also arranged. This detector device 3 indicates the rotational position in which certain symbols 1 'are currently located. If such a symbol 1 'is to be struck, the detector device 3 transmits a corresponding trigger command to one or more of the print hammers 5. In the exemplary embodiment according to the invention, there is also an ink ribbon 6 between the printing end of the print hammers 5 and the types 1' printing paper In the present example, the ink ribbon should be adjacent to the printing types 1 *, while the paper to be printed is between the ink ribbon 6 and the printing hammers 5. For this reason, types I ^{1 are shown} in mirror image on the outer surface of the type carrier drum 1. Between the printing types 1 'and the ink ribbon 6 on the one hand and the ink ribbon 6 and the paper 9 to be printed there is a screen, namely the screen 7 on the one hand and the screen 8 on the other Windows corresponding to printing types I ^{1 running continuously past.} The ribbon 6 is at least two-colored, as known from typewriters. The two diaphragms 7 and 7 form a structural unit, either in that they are composed of two corresponding elements before being installed in the printing device, or in that they are made in one piece from the outset.

309844/046

Diploma Heinz Lesser. Pci «? / 1 tem wait D-8 Munich 81, Cosimoslrafje 81 - Telephone ·. (0311) 98 33 20

As can be seen in particular from FIG. 3, the paper 9 to be printed is moved by two rollers 10 and 10 *, wherein the roller 10 * can represent a pressure roller and the roller 10 a drive device. With the help of a Guide 11 guides the paper into the desired position.

An important feature of the invention is that at least one of the diaphragms, preferably both, are designed as elastic bodies in such a way that they can be deformed to move under the movement of the hammers.5 for a printing process to be carried out on the outer surface of the drum 1. In Fig. 3, a corresponding offset of the diaphragm 7 is shown in dashed lines 7 ¹ . The diaphragm 7 moves under the pressure of a hammer 5 towards the outer surface of the drum 1 in such a way that the rows on the outer surface of the printing drum

I trained print types 1 'in the appropriate window the cover 7 protrude. In this way it is possible to expose relatively thick paper to the printing process. The thin ribbon 6, which is the only body between the paper to be printed and the print types

I ^I allows a clear print.

In the illustrated embodiment, the ribbon 6 is arranged and guided between the two diaphragms 7 and 8. The elastic design of both panels ensures that

outside the printing times, the ink ribbon 6 is definitely removed from J the printing types 1 ', whereas on the other hand the paper 9 to be printed is guided at a distance from the ink ribbon 6. In this way, on the one hand, it is prevented that the ink ribbon 6 ^{can be carried along by the printing types I 1} *, on the other hand, it is definitely avoided that the ink ribbon 6 attacks the paper 9 to be printed outside the printing processes. The elastic design of both panels also ensures a printing process with relative

09844/0460

Dipl.-Ing. Heinz Lesser, patent attorney D-8 Mönchen Sl, Co ^ ifT.Qstia6e 81 · Telephone: (0811) 98 33? 0

low energy consumption.

Furthermore, the separate guiding of the ink ribbon 6 and the paper 9 at a distance from other parts of the printing device through the diaphragms 7 and 8 on the one hand and the diaphragm 8 and the paper guide device 11 on the other hand the further advantage that the ribbon 6 and the paper can be moved on quickly. The one-piece training the diaphragm 7 and the diaphragm 8 also offer the advantage that, given the desired quality, a simple Manufacturing method is guaranteed. In the case of a high-speed printer j - a so-called flying printer - with continuous moving type carrier it is therefore possible according to the invention to obtain an extremely clear print without the printing speed needs to be reduced, with regard to the thickness of the paper and the number of sheets there are only minor restrictions, although a narrow, easily obtainable ribbon can be used.

Although only a type carrier in the form of a rotating Drum has been described, a type carrier in the form of a belt, a rod or a chain od. Like. Find use.

The invention shows its particular advantages when applied to a registration printing device or the like, in which thick paper, such as letters and accounting paper or large amounts of print through can be used while still achieving a clear print.

3 0 9-8 4 W. (K

Claims (9)

Dip! .-! Ng. Hein? Usser, Potentonvrall D-8 Mönchen 81, Ccximostrofce Sl ■ Telephone: (08Tl) 98 Ji20 - 7 - PATENT CLAIMS ι 1.jDruck device with a continuously moving - printing type carrier and at a certain point in the front of the types with intermediate arrangement of ink ribbon and paper to be printed printing hammers provided, characterized by at least one between the printing hammers (5) and the printing types (I ¹ ) arranged screen (7 ;8th). 2. Printing device according to claim 1, characterized in that the screen (7) is arranged between the ink ribbon {6) and the printing types (I ¹ ). 3. Printing device according to claim 1, characterized in that the diaphragm (8) between the ribbon (6) and the to printing paper (9) is arranged. 4. Printing device according to one of the preceding claims, characterized in that the cover (7; 8) a separate one for each type series Has recess. 5. Printing device according to one of the preceding claims, characterized in that ^{a diaphragm (7, 8) is provided both between the ink ribbon (6) and the printing types (I 1} ) and between the ink ribbon and the paper to be printed (9). 6. Printing device according to one of the preceding claims, characterized in that "" 3 ö ~ 9 ÖTTTÖT ^ Ö ^; Dipl.-Ing. Heinz Leisei, patent attorney, D-8 Munich 81, CosiinostrijfjP 81 Telephone: (0811) 98 3320 - 8th - the diaphragm or diaphragms (7; 8) are designed as bodies that are flexible at least in the direction of the pressure hammer movement are. 7. printing device according to claim 5, characterized in that the diaphragms (7, 8) are designed as a one-piece component are. 8. Printing device according to one of the preceding claims, characterized in that a narrow, commercially available ribbon (6) is used. 9. Printing device according to claim 8, characterized in that the color ribbon (6) is at least two-colored. 309844/0460 Blank page