EP0073841A1 - Butée d'impression pour imprimantes rapides, spécialement pour des imprimantes comportant une bande porte-types - Google Patents
Butée d'impression pour imprimantes rapides, spécialement pour des imprimantes comportant une bande porte-types Download PDFInfo
- Publication number
- EP0073841A1 EP0073841A1 EP81106630A EP81106630A EP0073841A1 EP 0073841 A1 EP0073841 A1 EP 0073841A1 EP 81106630 A EP81106630 A EP 81106630A EP 81106630 A EP81106630 A EP 81106630A EP 0073841 A1 EP0073841 A1 EP 0073841A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- abutment
- pressure abutment
- printers
- type
- 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.)
- Granted
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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/02—Platens
- B41J11/04—Roller platens
Definitions
- the invention relates to print abutments for high-speed printers, in particular for type tape printers. .
- European patent application 80104963.6 (GE 980 009) describes a rotating, roller-shaped pressure abutment for a type tape printer. To avoid ruts on the roller due to the rotating type belt and also to achieve a distribution of the other wear of the roller on its peripheral surface, the roller is set in a very slow rotation by a gear motor.
- roller diameter results in undesirable abrasion and deformation effects on the type carrier itself, as will be described later in more detail later.
- the object of the invention is to provide an improved pressure abutment in order to achieve good font quality.
- a type tape 2 serves as the type carrier, from which raised characters 3 are etched out. This type band (made of steel) moves vertically out of the drawing plane past the flat pressure abutment 1.
- a color blanket 4 and a recording medium 5 are arranged in front of the type tape 2. If the print hammer 6 strikes against the symbol 3 on the type carrier tape 2 in the indicated arrow direction D, the latter is briefly pressed against the pressure abutment 1.
- the hammer surface never hits the flat pressure abutment in parallel, which results in different blackening areas of the printed character.
- Roller-shaped pressure abutments on the other hand, have the disadvantage of very high compressive stresses, since an approximately only linear one because of the relatively small radius of the pressure roller Can be done between the type belt and roller.
- the high compressive stresses lead to enormous wear on the type carrier and to plastic deformation of the same. Symbolically speaking, the roller digs itself into the type holder, so that in unfavorable cases the characters can break out of the type holder.
- KBP pressure abutment in the following. A schematic diagram of this is shown in a sectional illustration in FIG. 2.
- This KBP pressure abutment has four stop surfaces 8, 9, 10, 11, and an axis 12 about which the pressure abutment can be rotated. This makes it possible to set the various stop surfaces.
- FIG. 3 shows a sectional illustration of a practical embodiment of such a KBP pressure abutment 13. It consists of an annular Stahlman tel 14, at the ends of end plates 19 are placed. Each end plate has an axle hole 17 through which a rotatable axle runs (not shown). Flanges firmly connected to this rotatable axis are connected by screws or the like to the openings 18 of the end plates of the pressure abutment, so that the latter forcibly rotates with the axis when a new stop surface is to be brought into the printing position.
- the axis is driven e.g. B. via conventional gear ratchet circuits.
- abutment strips 15 and 16 The individual abutment surfaces, of which only two, namely 15-1 and 16-1, are shown for reasons of simplification, are provided by so-called abutment strips 15 and 16.
- Such an abutment strip has an essentially rectangular cross section in the lower part, which is widened in the shape of a circular arc at the top.
- the radius R to be assigned to this circular arc can be of the order of 150 mm, while the outer cylinder diameter is approximately 25 mm.
- Recesses 19 are milled into the cylinder ring, into which the lower part of the pressure abutment strips is glued.
- These pressure abutment strips are expediently made of a material which has a wear-reducing effect on the type strip running past the pressure abutment.
- FIG. 4 shows a perspective view of a KBP pressure abutment 13 according to the invention according to FIG. 3.
- the drive axis extending through the pressure abutment is identified by 20, the abutment strips as in FIG. 3 by 15 and 16.
- the abutment strips consist of a steel beam 21 and bearing material 22 for the impact surface.
- the illustration of further pressure stop bars has also been omitted, as well as the illustration of drive means for the axis of rotation 20, to which reference was already made in the description.
Landscapes
- Handling Of Sheets (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8181106630T DE3173882D1 (en) | 1981-08-26 | 1981-08-26 | Pressure abutment for high-speed printers, especially for belt-type printers |
EP81106630A EP0073841B1 (fr) | 1981-08-26 | 1981-08-26 | Butée d'impression pour imprimantes rapides, spécialement pour des imprimantes comportant une bande porte-types |
JP13582082A JPS5839479A (ja) | 1981-08-26 | 1982-08-05 | プラテン |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81106630A EP0073841B1 (fr) | 1981-08-26 | 1981-08-26 | Butée d'impression pour imprimantes rapides, spécialement pour des imprimantes comportant une bande porte-types |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0073841A1 true EP0073841A1 (fr) | 1983-03-16 |
EP0073841B1 EP0073841B1 (fr) | 1986-02-26 |
Family
ID=8187870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81106630A Expired EP0073841B1 (fr) | 1981-08-26 | 1981-08-26 | Butée d'impression pour imprimantes rapides, spécialement pour des imprimantes comportant une bande porte-types |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0073841B1 (fr) |
JP (1) | JPS5839479A (fr) |
DE (1) | DE3173882D1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4597682A (en) * | 1984-11-13 | 1986-07-01 | Reflective Technology, Inc. | Impact print bar assembly |
EP0194694A2 (fr) * | 1985-03-15 | 1986-09-17 | Hitachi, Ltd. | Cassette à ruban pour imprimante |
US4722621A (en) * | 1985-10-30 | 1988-02-02 | Johnson Reynold B | Keyboard assembly and recording apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS605846U (ja) * | 1983-06-22 | 1985-01-16 | 富士通株式会社 | プラテン構造 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US837279A (en) * | 1906-02-03 | 1906-12-04 | Charles W Bradford | Platen for type-writers. |
CH306400A (fr) * | 1949-02-15 | 1955-04-15 | Cudell Goetz Carlos | Cylindre rotatif pour machine à écrire. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5513012B2 (fr) * | 1972-03-28 | 1980-04-05 | ||
JPS5852929Y2 (ja) * | 1978-07-10 | 1983-12-02 | エプソン株式会社 | ドットプリンタの印字受台 |
JPS5630872A (en) * | 1979-08-22 | 1981-03-28 | Tokyo Electric Co Ltd | Dot printer |
-
1981
- 1981-08-26 DE DE8181106630T patent/DE3173882D1/de not_active Expired
- 1981-08-26 EP EP81106630A patent/EP0073841B1/fr not_active Expired
-
1982
- 1982-08-05 JP JP13582082A patent/JPS5839479A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US837279A (en) * | 1906-02-03 | 1906-12-04 | Charles W Bradford | Platen for type-writers. |
CH306400A (fr) * | 1949-02-15 | 1955-04-15 | Cudell Goetz Carlos | Cylindre rotatif pour machine à écrire. |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4597682A (en) * | 1984-11-13 | 1986-07-01 | Reflective Technology, Inc. | Impact print bar assembly |
EP0194694A2 (fr) * | 1985-03-15 | 1986-09-17 | Hitachi, Ltd. | Cassette à ruban pour imprimante |
EP0194694A3 (en) * | 1985-03-15 | 1989-02-01 | Hitachi, Ltd. | Printer and ribbon cassette therefor |
US4722621A (en) * | 1985-10-30 | 1988-02-02 | Johnson Reynold B | Keyboard assembly and recording apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE3173882D1 (en) | 1986-04-03 |
JPH0128709B2 (fr) | 1989-06-05 |
EP0073841B1 (fr) | 1986-02-26 |
JPS5839479A (ja) | 1983-03-08 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19810909 |
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