GB1416295A - Ribbon control in electromechanical printers - Google Patents
Ribbon control in electromechanical printersInfo
- Publication number
- GB1416295A GB1416295A GB4391274A GB4391274A GB1416295A GB 1416295 A GB1416295 A GB 1416295A GB 4391274 A GB4391274 A GB 4391274A GB 4391274 A GB4391274 A GB 4391274A GB 1416295 A GB1416295 A GB 1416295A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- dragged
- ribbon
- motors
- output
- 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
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
- B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
- B41J33/14—Ribbon-feed devices or mechanisms
- B41J33/40—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction
- B41J33/44—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically
- B41J33/51—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically and characterised by the use of particular reversing control means
Landscapes
- Impression-Transfer Materials And Handling Thereof (AREA)
Abstract
1416295 Drive arrangement for print ribbon INTERNATIONAL STANDARD ELECTRIC CORP 10 Oct 1974 [22 Oct 1973] 43912/74 Heading H2J An electromechanical printer has first and second motors providing drive respectively for each of the printer ribbon spools such that when one motor is being driven, the other motor is being dragged, and has first and second circuits respectively associated with the first and second motors each circuit providing one electrical logic state when its corresponding motor is being driven and a different logic state when its motor is being dragged, means responsive to a change in the logic state of the circuit associated with the motor being dragged during a printing operation such that the source of energy to the driving motor is switched to the motor being dragged. Motors M1 and M2 having coils L11, L12; L21, L22 are powered with A.C. across points A, B and switch S1, which is controlled by flip-flop JK supplies power to one of the motors, e.g. Ml. Whilst Ml is being driven, M2 will act as a generator and rectified A.C. will pass through the diode of optical isolator OP2 and cause point P of Darlington pair T2, which is normally high, to be grounded. An identical circuit arrangement is associated with motor M1 and the outputs of the circuits are connected to inputs 1, 2 of a gate and Schmidt trigger ST, the input 3 being connected to an external logic circuit to indicate a "print" command. The output from the gate is designed to be "high" in all events except where the end of the ribbon is reached during a printing operation, whereby the motor being dragged will be stopped and the voltage generated thereby will fall causing the input at ST to go "high" and the output to go to "low" and trigger flip-flop JK. In an alternative embodiment, Fig. 3 (not shown), the motor generated voltages are applied to respective comparators which produce square wave outputs in phase with their inputs. The coupled outputs are then used to trigger a monostable such that when the idling motor is moving normally, a constant output from the monostable is obtained, but when it slows when the end of the ribbon is reached, a change of output, which triggers the flip-flop via a gate and Schmidt triggers, occurs. A counter to count the number of reversals in any one print operation may be provided and an alarm activated if this exceeds a particular number.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU532873 | 1973-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1416295A true GB1416295A (en) | 1975-12-03 |
Family
ID=3695796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4391274A Expired GB1416295A (en) | 1973-10-22 | 1974-10-10 | Ribbon control in electromechanical printers |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE833737A (en) |
GB (1) | GB1416295A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4146338A (en) * | 1977-03-30 | 1979-03-27 | Xerox Corporation | End-of-ribbon sensor circuitry |
EP0033100A2 (en) * | 1980-01-28 | 1981-08-05 | International Business Machines Corporation | Bidirectional ribbon drive control |
US4313683A (en) * | 1979-10-19 | 1982-02-02 | International Business Machines Corporation | Microcomputer control of ribbon drive for printers |
FR2607603A1 (en) * | 1986-11-27 | 1988-06-03 | Sebbagh Maurice | Method and electronic device for control and monitoring of the movement of a ribbon, especially for a printer of the roller and inking ribbon type |
US4969761A (en) * | 1990-01-29 | 1990-11-13 | Banctec, Inc. | Apparatus and method for controlling print ribbon feed |
GB2559404A (en) * | 2017-02-06 | 2018-08-08 | Dover Europe Sarl | A printing apparatus |
-
1974
- 1974-10-10 GB GB4391274A patent/GB1416295A/en not_active Expired
-
1975
- 1975-09-24 BE BE2054575A patent/BE833737A/en unknown
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4146338A (en) * | 1977-03-30 | 1979-03-27 | Xerox Corporation | End-of-ribbon sensor circuitry |
US4313683A (en) * | 1979-10-19 | 1982-02-02 | International Business Machines Corporation | Microcomputer control of ribbon drive for printers |
EP0033100A2 (en) * | 1980-01-28 | 1981-08-05 | International Business Machines Corporation | Bidirectional ribbon drive control |
EP0033100A3 (en) * | 1980-01-28 | 1983-01-26 | International Business Machines Corporation | Bidirectional ribbon drive control |
FR2607603A1 (en) * | 1986-11-27 | 1988-06-03 | Sebbagh Maurice | Method and electronic device for control and monitoring of the movement of a ribbon, especially for a printer of the roller and inking ribbon type |
US4969761A (en) * | 1990-01-29 | 1990-11-13 | Banctec, Inc. | Apparatus and method for controlling print ribbon feed |
GB2559404A (en) * | 2017-02-06 | 2018-08-08 | Dover Europe Sarl | A printing apparatus |
US10406841B2 (en) | 2017-02-06 | 2019-09-10 | Dover Europe Sarl | Printing apparatus |
US10814656B2 (en) | 2017-02-06 | 2020-10-27 | Dover Europe Sarl | Printing apparatus |
Also Published As
Publication number | Publication date |
---|---|
BE833737A (en) | 1976-03-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |