DE2016917B2 - Point recorder - Google Patents

Description

The invention relates to a point writer with several with their pressure tips in two columns across writing wires lined up to the writing line, in the first column with equal spacing and in the second column spaced from those of the first column and individually for writing one; Point can be activated and are connected to an activation unit which, in the case of the individual feed steps of the printing peaks taking place in the line direction together with respect to a writing surface According to a letter to be written in each case, individual writing wires are activated jointly.

In a point writer known from French patent specification 31 666, the writing wires are arranged with their pressure tips in a row one below the other.

In a point recorder previously known from US Pat. No. 29 97 361 of the type mentioned at the beginning Art, the writing wires are lined up in two columns across the writing line, namely in the second column, related to the direction of the writing line, to the gap to those of the first column. To this Way, it is possible to set up the printing dots more densely in the column direction than the arrangement of the Corresponds to pressure peaks in the column The object of the invention is to produce a print that is as easy to read as possible with the least possible expenditure on pressure peaks To achieve pressure.

, The invention is characterized in that the Writing wires of the second column at the same height as the column

ίο the most common curvatures in letter strokes are arranged.

The invention makes use of the fact that, for legibility, it is particularly important to the bent parts the character arrives, and these are due to the additionally provided writing wires can be printed out with particularly sharp contours. The invention achieves with. relatively little effort, namely by using fewer additional wires, compared to the first mentioned known point writer one Significant improvement in legibility to the opposite the second known point recorder mentioned the effort required by the invention is lower with essentially the same result.

Further features and details of the invention

are the subject of the subclaims.

The invention will now be explained in more detail with reference to the drawing

F i g. 1 a writing head for a writer according to the invention,

F i g. FIG. 2 shows the pressure tip arrangement for the writing head according to FIG. 1 and

F i g. 3 lowercase letters, which are marked with a dot pen according to fig. 1 and 2 are printed out. F i g. 1 shows a wire pen according to the invention, whose magnetic head 10 has a plurality of wires 11 which can be activated individually by moving them longitudinally and activates a ribbon 12 against a recording surface, for example a writing paper 13, which is located in front of a support surface 14 is to press. In this way letters can be written with a wide variety of points, with every single point is drawn by advancing a wire. In the illustrated embodiment, magnetic displacement units 15 are for the individual wires 11 are provided, of which individual selected, according to the to be printed Letter to be activated. The magnetic head 10 is gradually moved in the writing line direction over the Paper guided The magnetic head 10 is longitudinally displaceable borrowed on a bearing rod 19. For transport of the magnetic head back and forth is a rotatably mounted screw spindle 16 which is in a screw thread of the magnetic head is screwed in. The bearing rod 19 slides in a guide opening 20 of the magnet head feslO.

The individual feed units 15 each have an electromagnet, the armature of which on the associated Wire 11 acts and this with magnetic excitation in a wire guide 21 longitudinally, namely in Direction on the paper 13 shifts. The wire guide 21 is attached to the frame of the with screws 21a Magnetic head and extends over the space between the feed units 15 and the paper 13. The ribbon is over rollers 22 and between the pressure-side end of the guide 24 and the paper 13 out.

The individual feed units 15 are, while the magnetic head 10 is moved in the line direction,

Switched on as required by an activation unit 26 via associated lines 25. At 27 there is one Letter logic that responds to an input signal that identifies the letter to be printed out, emits control signals to the activation unit 26 via the line 28 These control signals indicate which wires or which feed units are activated in the individual printing phases to express the addressed letter.

In Fig.2 are to explain the arrangement of provided wires, the print positions of the provided wires are drawn as circles. The in Fig.2 The image shown would result as a print image if all the wires were simultaneously in one printing phase activated

The top seven wires are sufficient to print out the capital letters, while the two wires provided below the dashed line are also used to print out the lower case letters. These two wires are advantageous in connection with those lower case letters, such as the letters ρ and q, protrude below the writing line. A comma and a semicolon can also be written much more legibly using the two wires than without these two additional wires. Corresponding advantages also result in connection with other characters, for example foreign characters, which are not considered here.

In addition to the nine wires arranged one above the other in a column, there are two additional wires 41 and 44 at the level of the next intermediate column between the wire positions 42 and 43, 45 and 46 (all related to the printing position of the wires). The wire 41 can together with the adjacent wire 42 and / or 43 can be activated, it can also be activated for itself and it can then at the next printing phase the wire 42 and / or 43

ίο be activated, the same applies to the wire 44. The wire 41 makes it possible to print a large number of lowercase letters, namely the letters b, d, g, h, k, m, p, q, r, χ and z, more clearly legible , as can be seen from Fig.3.

In Fig. 3, the pressure points that are written with the wire 41 are denoted by 41a. In a corresponding manner, the additional wire 44 also promotes the possibility of printing out many lowercase letters in a more legible manner. The pressure points marked 44a in FIG. 3 are written with the wire 44 that is to be used. The additional Drahi 44 , among other things, makes the letters S, b, e, g, o, p, q easier to read. u, w and y. According to Fig. 3, if the additional wires 41 and 44 are used, the additional printing phases corresponding to the intermediate columns of the grid can be dispensed with, because the pressure points actually required on these intermediate columns for the lower case letters can be written by the two additional wires 41 and 44 provided.

1 sheet of drawings

Claims (4)

Patent claims: 1. Point recorder with several with their pressure syringes in two columns across the writing line strung writing wires that are evenly spaced in the first column and in the second Column spaced from those of the first column and individually for writing one Point can be activated and are connected to an activation unit *, which is used for the individual in Line direction taking place jointly with respect to a writing surface advance steps of the printing peaks according to a respective one to be written Letter individual writing wires activated together, characterized in that the writing wires (41,44) of the second column on the Column height of the most common curvatures are arranged in letter strokes. 2. Point recorder according to claim 1, characterized in that the range of action of a Printing peak is greater than a feed step and that the printing peaks of the second column by Half of an overlapping line feed section compared to those of the first column in Feed direction are offset. 3. Point writer according to Ass claim 1, characterized by such a configuration of the activation unit that a writing wire after a a certain feed step is not activated if it was activated in the previous feed step 4. Point recorder avenge him -, m the previous one Claims, characterized in that! For capital letters seven writing drifts with their pressure tips in a column arrangement one above the other the same distance are provided that a line feed step is as large as half Vertical distance between two adjacent pressure peaks in the column arrangement, and that for additional writing of lower case letters according to the column arrangement of the seven printing peaks is extended below by the pressure tips of two more writing wires.