EP0048418B1 - Anordnung mit mehreren Schaltstellungen für eine Bandkassette - Google Patents
Anordnung mit mehreren Schaltstellungen für eine Bandkassette Download PDFInfo
- Publication number
- EP0048418B1 EP0048418B1 EP19810107217 EP81107217A EP0048418B1 EP 0048418 B1 EP0048418 B1 EP 0048418B1 EP 19810107217 EP19810107217 EP 19810107217 EP 81107217 A EP81107217 A EP 81107217A EP 0048418 B1 EP0048418 B1 EP 0048418B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ribbon
- cassette
- cam
- pivot plate
- ribbon cassette
- 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
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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
- B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
- B41J35/04—Ink-ribbon guides
- B41J35/10—Vibrator mechanisms; Driving gear therefor
- B41J35/12—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift
- B41J35/14—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift for multicolour work; for ensuring maximum life of ink ribbon; for rendering ink-ribbon inoperative
Definitions
- This invention relates to a multicolor ribbon cassette system for use in a printer or the like comprising a shuttle which is adapted to carry said printhead across a printing medium, and supporting means, coupled to said shuttle and movable in conjunction with the print head for supporting a ribbon cassette having a ribbon therein, said ribbon cassette carrying a portion of said ribbon parallel to the printing medium, said supporting means being pivotal about an axis to change the vertical position of the ribbon cassette and of the printing bands of the ribbon with respect to the printhead.
- DE-A-2,337,626 discloses a multiposition ribbon cassette system of the type specified above in which the shifting of the ribbon is accomplished by pivotal motion of the cassette rather than translational motion of the ribbon.
- the ribbon cassette is pivoted about an axis which is parallel to the printing medium.
- the ribbon plane is tilted with respect to the printing medium when changing the vertical position of the ribbon cassette with respect to the printhead. Therefore the ribbon cannot be accurately positioned in a plane parallel to the printing medium.
- Movement of the entire ribbon assembly eliminates any kind of snagging of the ribbon.
- the entire cassette is moved in order to change printing bands and color respectively on the ribbon, the mechanism by which this is accomplished is extremely simple.
- the mechanism is shifted to align a different printing band to the printhead with the effective ribbon portion remaining in the same plane parallel to the printing medium.
- the system is particularly useful in conjunction with a matrix printer which includes a print head that is carried on a shuttle mechanism.
- Other printers which can utilize the invention include ball and daisy wheel types.
- a pivot plate has one end secured to the shuttle so as to enable the pivot plate to rotate about an axis which is perpendicular to both the printing medium and the portion of the ribbon which is in a printing position.
- a ribbon cassette is detachably mounted on the pivot plate.
- a ribbon drive motor is secured to the underside of the pivot plate and advances the ribbon within the cassette. By pivoting the pivot plate, different portions of the ribbon carried in the cassette will be positioned adjacent the print head. However, since the ribbon is pivoting about an axis perpendicular to the printing medium, it will remain parallel to the printing medium as it is moved.
- the movement of the pivot plate is controlled by means of a barrel cam which is driven by a stepper motor.
- the barrel cam and the stepper motor are attached to the shuttle, and the cam is coupled to the pivot plate by means of a cam follower.
- the position of the cam is controlled by a suitable logic circuit.
- Other types of positioning arrangements such as a movable ramp, may also be utilized.
- the cam arrangement provides a simple means of accurately positioning the ribbon cassette with respect to the print head.
- a printer 10 having a wire matrix print head 12 carried on a shuttle mechanism 14.
- the print head 12 is biased against a front portion 14a of the shuttle.
- the shuttle moves along a pair of rails 16 which are attached to a frame 18.
- a ribbon cassette 20 is carried on the shuttle and includes an opening 20a through which the print head 12 extends.
- the ribbon cassette 20 carries a ribbon 22, an exposed portion of which (22a) is carried in a front of the print head and is substantially parallel to a printing medium 24.
- the ribbon cassette 20 is detachably connected to a pivot plate 26 which serves to position the ribbon cassette 20 with respect to the print head 12.
- the pivot plate 26 is pivotally connected to the shuttle 14 by means of a pair of hinges 28 which enable the pivot plate 26 to rotate about an axis which is perpendicular to the printing medium 24 and ribbon portion 22a. Because of this configuration, the ribbon portion 22a will remain parallel to the printing medium 24 as the pivot plate 26 and ribbon cassette 20 are pivoted. The pivoting of the pivot plate 26 will align a different portion of the height of the ribbon portion 22a with the front 12a of the print head.
- the ribbon 22 is advanced by means of a ribbon drive motor 38 which is connected to the underside of the pivot plate 26.
- the position of the pivot plate 26 is controlled by means of a barrel cam 32 which is attached to the shuttle 14.
- the barrel cam is driven by a motor 36 and is coupled to the pivot plate 26 by means of a bar shaped cam follower 34.
- the cam 32 includes a substantially spiral groove 32a having four flat rest positions which serve to define four distinct printing positions (FIGURE 5) for the ribbon cassette 20.
- the cam follower includes a protrusion 34a which cooperates with the spiral groove 32a and a protrusion 34b which extends into a notch 26a in the pivot plate.
- the motor 36 which is a stepper motor in the present embodiment of the invention, operates to rotate the cam 32 so that the cam follower portion 34a is positioned in one of the four flat portions of the spiral groove 32a.
- the flat portions enable accurate ribbon height positioning to be achieved despite slight inaccuracies in motor position, and also prevents rotation of the cam 32 which would otherwise be caused by the application of downward force on the cassette 20.
- the motor 36 is controlled by a suitable logic circuit 39.
- the logic circuit 39 is such that when power is first applied to the printer 10, the.stepper motor 36 is commanded to bring the cassette 20 down to the horizontal position by shiftinq the cam follower 34 down four times. If the cassette 20 is already down or partially down, the motor 36 simply stalls for all or some of the four shift commands. Once this initiallizing process has been completed, the logic circuit 39 knows that the cassette is on band one of the ribbon 22 and keeps track of the position of the cassette as long as the power remains on.
- FIGURE 5 The positions of a four band ribbon 22 with respect to the front of the printhead 12a corresponding to different positions of the cam 32 are shown in FIGURE 5.
- band 1 of the ribbon 22 is aligned with the printhead 12a
- band 4 of of the ribbon 22 is aligned with the printhead 12a.
- the first type includes four separate color bands to provide four color printing capability.
- the second type includes an all black (or other single color) ribbon. Both types of cassettes utilize a ribbon having the same width (one inch).
- a two step process is utilized. Each ribbon cassette includes a projection or fin 40 extending from the bottom surface of the cassette. When the pivot plate is in its horizontal position, the projection 40 on either cassette is detected by means of an optical sensor 42 located on the shuttle 14. After it has been determined that a ribbon cassette is in place, the pivot plate is shifted up two positions and the sensor 42 again activated.
- the length of the projection 40 on a cassette having a four color ribbon is shorter than that on a cassette having a single color ribbon.
- the length of a single color projection is shown in FIGURE 3 by a dashed line 40a.
- the present invention is directed to a simple and effective way of utilizing a multicolor ribbon cassette in a printing mechanism.
- the invention has been described in terms of use with a matrix printer, it could easily be adapted for use with other types of printers.
- By shifting the position of the entire cassette instead of simply moving a portion of the ribbon installation of a cassette is a very simple procedure, since nothing special has to be done with the ribbon (i.e., threading into a bail arm).
- the shifting has been described in terms of the tilting of a ribbon cassette, a system could employ a shift mechanism which maintains the cassette in a horizontal orientation and shifts the entire cassette vertically in order to properly align the ribbon with the printhead.
- the system can easily handle more than two colors despite the large distance between the plural color tracks.
- the system provides for more accurate positioning than do typical bail systems.
Landscapes
- Impression-Transfer Materials And Handling Thereof (AREA)
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18912280A | 1980-09-22 | 1980-09-22 | |
US189122 | 1980-09-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0048418A1 EP0048418A1 (de) | 1982-03-31 |
EP0048418B1 true EP0048418B1 (de) | 1984-06-13 |
EP0048418B2 EP0048418B2 (de) | 1987-01-21 |
Family
ID=22696024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810107217 Expired EP0048418B2 (de) | 1980-09-22 | 1981-09-12 | Anordnung mit mehreren Schaltstellungen für eine Bandkassette |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0048418B2 (de) |
JP (1) | JPS5787394A (de) |
BR (1) | BR8106048A (de) |
DE (1) | DE3164194D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8904219U1 (de) * | 1989-04-05 | 1990-08-09 | Nixdorf Computer Ag, 4790 Paderborn | Verstelleinrichtung für die Farbbandkassette |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59102361U (ja) * | 1982-12-27 | 1984-07-10 | 株式会社精工舎 | キヤリツジへのリボンカセツト取付構造 |
IT8353197V0 (it) * | 1983-04-13 | 1983-04-13 | Olivetti & Co Spa | Cartuccia per un nastro di scrittura di macchine per scrivere |
US4543002A (en) * | 1983-06-16 | 1985-09-24 | Genicom Corporation | Multicolor printing |
JPS6064884A (ja) * | 1983-09-20 | 1985-04-13 | Canon Inc | 印字装置 |
JPS6069666U (ja) * | 1983-10-19 | 1985-05-17 | ブラザー工業株式会社 | タイプライタのリボンリフト機構 |
GB8405455D0 (en) * | 1984-03-01 | 1984-04-04 | Data Recording Instr Co | Printing apparatus |
JPH0611578B2 (ja) * | 1984-03-16 | 1994-02-16 | セイコーエプソン株式会社 | カラ−プリンタ |
JPS6260352U (de) * | 1985-10-02 | 1987-04-14 | ||
US5267803A (en) * | 1987-11-30 | 1993-12-07 | Smith Corona Corporation | Cassette having compatibility arrangement |
JPH0434427U (de) * | 1990-07-20 | 1992-03-23 | ||
JPH09240090A (ja) * | 1996-03-12 | 1997-09-16 | Brother Ind Ltd | 印字装置、記録装置及びリボンカセット |
-
1981
- 1981-09-12 EP EP19810107217 patent/EP0048418B2/de not_active Expired
- 1981-09-12 DE DE8181107217T patent/DE3164194D1/de not_active Expired
- 1981-09-22 JP JP15046281A patent/JPS5787394A/ja active Granted
- 1981-09-22 BR BR8106048A patent/BR8106048A/pt unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8904219U1 (de) * | 1989-04-05 | 1990-08-09 | Nixdorf Computer Ag, 4790 Paderborn | Verstelleinrichtung für die Farbbandkassette |
Also Published As
Publication number | Publication date |
---|---|
DE3164194D1 (en) | 1984-07-19 |
JPS5787394A (en) | 1982-05-31 |
BR8106048A (pt) | 1982-06-08 |
JPH0253236B2 (de) | 1990-11-16 |
EP0048418B2 (de) | 1987-01-21 |
EP0048418A1 (de) | 1982-03-31 |
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