EP0075342B1 - Verschiebbarer Druckkopf - Google Patents
Verschiebbarer Druckkopf Download PDFInfo
- Publication number
- EP0075342B1 EP0075342B1 EP82201043A EP82201043A EP0075342B1 EP 0075342 B1 EP0075342 B1 EP 0075342B1 EP 82201043 A EP82201043 A EP 82201043A EP 82201043 A EP82201043 A EP 82201043A EP 0075342 B1 EP0075342 B1 EP 0075342B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needles
- recesses
- parts
- parallel
- faces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
- B41J2/25—Print wires
- B41J2/255—Arrangement of the print ends of the wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
- B41J25/005—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for serial printing movements superimposed to character- or line-spacing movements
Definitions
- Switchable needle writing heads comprising at least two rows of needles, these needles being slidably mounted in guide paths in a support in two parts, these rows being arranged substantially vertically with respect to the direction d writing a line by the head, means allowing at will to produce a relative displacement between the two parts of the support to align the positions of the needles of one row relative to the positions of the needles of another row parallel to the writing direction, or shift these positions between the two rows (see patent USA-A-4,010,835).
- the object of the present invention is to provide a needle head of this type, the construction of which is very precise while being simple to produce.
- the object is achieved by means of the writing head defined in claim 1.
- the writing head shown comprises a support 1 formed by two parts 2 and 3, the part 2 being integral with the writing head which is not shown, because it is well known in itself.
- Part 3 is slidably mounted on part 2.
- This support has guide paths for two rows of needles, these paths being produced in an industrial ruby 4 which is shown on a larger scale in FIG. 3 and which comprises a fixed part 5 and a mobile part 6, the latter being mounted on the sliding part 3.
- Part 3 is guided on part 2 by two tabs 7 and 8 of part 2, which are engaged in two recesses 9 and 10 of part 3.
- the latter also carries a finger 11 intended to control its movement relative to in part 2.
- the part 5 of the ruby 4 is itself made up of two parts 12 and 13 assembled by gluing 14.
- Piece 5 has a series of nine parallel recesses 15 of substantially semi-circular section and constituting guide paths for the needles 16 of a first row of needles.
- the part 13 also has a series of parallel recesses 17 arranged opposite the recesses 15, the section of which is arcuate so as to match the circular section of the needles 16, while leaving a play of a few hundredths of a millimeter to allow free sliding of the needles 16 in their respective guide paths.
- Guide paths are provided between the part 13 and the part 3 to receive a second row of needles 18.
- the needles of this second row can be moved vertically as a block with reference to FIG. 3 to be moved so as to be offset relative to the needles 16 of the first row, taking account of the writing direction A.
- the needles 18 can be brought into a position aligned with the needles 16 in the direction A.
- a rapid writing position is obtained when the needles 16 and 18 are aligned, since it is possible on the same line to carry out per unit of time, a double number of stitches than in the case where there is only one row of needles.
- the writing speed remains the same as if there was only one row of needles, but the quality is better since it is possible to obtain an overlap points drawn by the needles and therefore to make continuous lines.
- the two respective positions between parts 2 and 3 of the support are fixed by notching means made between parts 5 and 6 of the ruby 4.
- These means are constituted by two groups and two grooves 19, 20, 21 and 22 parallel to each other and parallel to the recesses 15.
- the bottoms of the grooves 19 and 20 and respectively 21 and 22 are spaced from each other by a value equal to half the spacing between the axes of the recesses 15.
- Each group of two grooves is arranged opposite a groove 23, respectively 24, substantially semi-circular, of the same radius as that of the recesses 15 and serving as a housing for a rod 25, respectively 26.
- These rods are glued in the grooves 23 and 24 and have a diameter corresponding to that of the needles 16 and 18, increased by the clearance provided to allow the latter to slide freely.
- part 3 of the support is biased towards part 5 of the ruby by a leaf spring 27 bearing against a boss 28 of part 3 and whose free ends are supported in housings 29 and 30. The action of this spring pushes rods 25 and 26 against the bottom of grooves 19 to 22.
- the writing head In needle printers, it is usual for the writing head to move along a cylinder on which the writing sheet is placed, this movement being limited at each of its ends by stops fixing the line margins of writings. This arrangement can be used to place the mobile row comprising the needles 18.
- the means of displacement and notching of the part 3 can be varied to a great extent, the displacements of the mobile part 3 can for example be controlled by an electromagnet fixed on the writing head.
Landscapes
- Impact Printers (AREA)
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH603881A CH644307A5 (fr) | 1981-09-18 | 1981-09-18 | Tete d'ecriture commutable. |
CH6038/81 | 1981-09-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0075342A2 EP0075342A2 (de) | 1983-03-30 |
EP0075342A3 EP0075342A3 (en) | 1984-03-28 |
EP0075342B1 true EP0075342B1 (de) | 1986-05-14 |
Family
ID=4303227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82201043A Expired EP0075342B1 (de) | 1981-09-18 | 1982-08-19 | Verschiebbarer Druckkopf |
Country Status (5)
Country | Link |
---|---|
US (1) | US4470713A (de) |
EP (1) | EP0075342B1 (de) |
JP (1) | JPS5862071A (de) |
CH (1) | CH644307A5 (de) |
DE (1) | DE3271153D1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3333252C2 (de) * | 1983-09-14 | 1986-02-13 | Nixdorf Computer Ag, 4790 Paderborn | Verfahren zur Herstellung eines Nadeldruckkopfes |
IT1176859B (it) * | 1984-10-05 | 1987-08-18 | Honeywell Inf Systems | Rubino e gruppo guida aghi per testina stampante ad aghi |
CH667618A5 (fr) * | 1986-03-21 | 1988-10-31 | Hermes Precisa International | Tete d'ecriture commutable. |
IT1247770B (it) * | 1990-10-31 | 1994-12-30 | Microlys Spa | Testa di stampa a matrice di punti per stampa ad alta definizione o ad alta velocita' |
US5880757A (en) * | 1991-11-04 | 1999-03-09 | Hewlett-Packard Company | Print resolution enhancement by adjusting printhead position |
JP2522231B2 (ja) * | 1991-11-15 | 1996-08-07 | 株式会社精工舎 | 印字モ―ドを切換え可能なワイヤドットプリンタ |
EP0580426B1 (de) * | 1992-07-21 | 1998-09-16 | Seiko Epson Corporation | Punktdruckkopf für Anschlagdrucker und Anschlagpunktdrucker |
JP2560681B2 (ja) * | 1992-09-18 | 1996-12-04 | セイコープレシジョン株式会社 | 印字モードを切換え可能なワイヤドットプリンタ |
US5793392A (en) * | 1995-06-13 | 1998-08-11 | Tschida; Mark J. | Printing apparatus and method |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2071162A5 (de) * | 1969-12-19 | 1971-09-17 | Radiotechnique Compelec | |
US3833105A (en) * | 1970-05-15 | 1974-09-03 | Centronics Data Computer | Printer head assembly |
US3625142A (en) * | 1970-06-10 | 1971-12-07 | Datascript Terminal Equipment | High-speed printing apparatus having slidably mounted character-forming elements forming a dot matrix |
GB1364646A (en) * | 1971-10-07 | 1974-08-29 | Creed Co Ltd | Printed telegraph machine |
DE2436970A1 (de) * | 1974-07-31 | 1976-02-19 | Siemens Ag | Vorrichtung in mosaiknadeldruckkoepfen zum fuehren der druckernadeln |
US4010835A (en) * | 1975-08-01 | 1977-03-08 | International Business Machines Corporation | Matrix print head |
DD128153A1 (de) * | 1976-08-26 | 1977-11-02 | Volker Flechtner | Mosaikdruckkopf |
SE408034B (sv) * | 1977-03-15 | 1979-05-14 | Philips Svenska Ab | Lageranordning vid ett mosaiktryckhuvud |
US4236836A (en) * | 1979-03-30 | 1980-12-02 | Teletype Corporation | Dot impact printer and actuator therefor |
DE3041877A1 (de) * | 1980-11-06 | 1982-05-13 | Mannesmann AG, 4000 Düsseldorf | Matrixdrucker und zugehoeriger nadeldruckkopf |
-
1981
- 1981-09-18 CH CH603881A patent/CH644307A5/fr not_active IP Right Cessation
-
1982
- 1982-08-19 DE DE8282201043T patent/DE3271153D1/de not_active Expired
- 1982-08-19 EP EP82201043A patent/EP0075342B1/de not_active Expired
- 1982-08-30 US US06/416,678 patent/US4470713A/en not_active Expired - Lifetime
- 1982-09-14 JP JP57160731A patent/JPS5862071A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5862071A (ja) | 1983-04-13 |
CH644307A5 (fr) | 1984-07-31 |
EP0075342A2 (de) | 1983-03-30 |
DE3271153D1 (en) | 1986-06-19 |
JPH0229022B2 (de) | 1990-06-27 |
EP0075342A3 (en) | 1984-03-28 |
US4470713A (en) | 1984-09-11 |
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