US3902584A - Paper feed system for high-speed printer - Google Patents
Paper feed system for high-speed printer Download PDFInfo
- Publication number
- US3902584A US3902584A US413592A US41359273A US3902584A US 3902584 A US3902584 A US 3902584A US 413592 A US413592 A US 413592A US 41359273 A US41359273 A US 41359273A US 3902584 A US3902584 A US 3902584A
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- United States
- Prior art keywords
- platen
- motor
- poles
- increments
- stepping motor
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/16—Means for paper feeding or form feeding
-
- 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
- B41J19/00—Character- or line-spacing mechanisms
- B41J19/76—Line-spacing mechanisms
- B41J19/78—Positive-feed mechanisms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S400/00—Typewriting machines
- Y10S400/902—Stepping-motor drive for web feed
Definitions
- the present invention relates generally to a paper feed system for a high-speed printer and more specifically to a system which is compatible with standard manual typing.
- Normal office typewriters have their platens detented for one-half the normal line space.
- a printer is to be used as an input/output device where it is to be both manually operated by a keyboard" and also to serve as an output device for a computer such line spacing must allow the computer to utilize its inherently greater capability; for example, for plotting or other unusual print formats.
- a paper feed system for a high-speed printer in which the line spacing is a predetermined distance consisting of a predetermined number of increments.
- Rotatable platen means receive and feed the paper to be printed upon and include manual rotating means.
- Stepping motor means is coupled to the platen means for incrementing the platen means.
- the stepping motor has a plurality of rotor poles and a plurality of stator poles which may be energized to alternately change polarity to thereby produce rotation or stepping of the motor.
- the motor has a natural detent for a predetermined number of steps when the rotor is manually rotated while the stator poles are continuously energized with a constant polarity.
- Gear means are provided to couple the stepping motor means to the platen means.
- the gear means have a gear ratio to provide for movement of the platen for a distance equal to one-half the number of increments which constitute a line space when the stepping motor is driven by the alternate energiza tion of the poles the predetermined number of steps which constitute the natural detent.
- FIG. I is a plan view of a printer embodying the present invention.
- FIG. 2 is a cross sectional view taken along line 2-2 of FIG. I;
- FIG. 3 is a simplified schematic of a stepping motor.
- FIG. 1 an overall view of the printer is illustrated.
- a platen 11 Mounted on frame is a platen 11 with left and right knobs 12 and 13 extending therefrom for rolling the platen. More specifically, knobs 12 and 13 are coupled to a shaft 14 which extends through the platen. The shaft is mounted for rotation on frame I0.
- a carriage 15 is mounted for linear movement on rods 16 and 17 and includes a rotary printing wheel having type elements and a hammer assembly for striking a selected type element for printing on paper carried on platen ll.
- Carriage 15 also includes a ribbon cartridge 18 having an inked ribbon which is interposed between a type element and the paper to be printed upon.
- Movement of carriage 15 along the line of printing is accomplished by a motor 21 which is coupled to the carriage by cable system 22.
- Motor 21 has mounted on one end of its shaft a transducer 23 which consists of two disks for providing position signals which are used in a servo system to provide incremental movement of carriage 15. Details of such transducer and its associated servo system are claimed in a copending application Ser. No. 157,283 filed June 28, 1971, entitled Apparatus For the Measurement of Relative Velocity Between Two Relatively Movable Members, in the name of Andrew Gabor and assigned to the present assignee. Overall details of the printer itself including the carriage 15 are disclosed and claimed in a copending application Ser. No. 229,314 filed Feb. 25, 1972, entitled High-Speed Printer With Intermittent Print Wheel and Carriage Movement in the name of Andrew Gabor and assigned to the present assignee.
- a stepping motor 24 is coupled to the shaft 14 by a gear train 26.
- Stepping motor 24 has mounted on its slhaft a small pinion gear 27 which drives a larger gear 28 mounted on a shaft 29 for rotation on frame 10 which in turn drives a gear 31 mounted on shaft 14 which is also the shaft for platen ll.
- Stepping motor 24 is of the type as illustrated in FIG. 3 having two fixed poles 32 and 33 here designated S and N respectively and a rotor 34 having a number of rotatable poles; in this specific case, six.
- S and N fixed poles
- a rotor 34 having a number of rotatable poles; in this specific case, six.
- the fixed poles 32 and 33 alternately change polarity in order to provide the stepping movement, that is, the polarities reverse alternately with winding 33 changing polarity first, followed by a reversal of'the polarity of winding 32, with the sequence continuing with winding 33 changing polarity and then winding 32 changing polarity.
- the resultant field will have a south pole between poles 32 and 33 and this resultant field will attract the north pole of the rotor segment between poles 32 and 33, thereby causing a clockwise rotation of rotor 34.
- the resultant field of the stator winding will change direction resulting in further clockwise rotation of rotor 34.
- a stepping motor of the type used in the present invention has a natural detent of four steps. Assuming the continuous cnergization of the poles 32 and 33 as illustrated and the manual rotation of rotor 34, the rotor must be rotated clockwise four steps before a rotor pole of the correct polarity will line up with the resultant field of the stator. Thus, a natural detent occurs each four steps of the rotor.
- the gear train 26 provides for movement of the platen 11 one-half of the nominal line spacing for four steps of the stepping motor 24.
- the platen II is moved four increments for each one-half line space. This provides a natural detent of one-half line space when the knobs l2 and 13 are rotated by the operator of the printer.
- the stepping motor is of the type which may be purchased from the A. W. Haydon Company of Waterbury, Conneticut under Model No. IDOS.
- a motor of this type has 48 steps to the revolution.
- the present printer would be used in the same manner as a standard typewriter and the standard typewriter halfline space is one-twelfth inch, there will be 48 increments per inch of circumferential platen movement.
- the gear train shown in FIG. 2 thus provides for 1 inch of movement of the periphery of the platen 11 for one revolution of shaft 27.
- the representational stepping motor of FIG. 3, which has I2 steps per revolution, could theoretically be used but it is found that 48 steps provides for more advantageous gear ratios.
- the present invention provides a paper feed system for a high-speed printer which is compatible with standard manual typing for providing a one-half line detent but is adaptable to a computer driven output device since the stepping motor may be driven in one-eighth line increments thus providing a great number of increments per inch for plotting and similar purposes.
- a paper feed system for a high-speed printer in which the line spacing is a predetermined distance consisting of a predetermined number of increments comprising: rotatable platen means for receiving and feeding paper to be printed upon, said platen means having manual rotating means; stepping motor means coupled to said platen means for incrementing said platen means said stepping motor having a plurality of rotor poles and a plurality of stator poles which may be energized to alternately change polarity to thereby produce rotation or stepping of said motor having a natural detent for a predetermined number of steps when said rotor is manually rotated while said stator poles are continuously energized with a constant polarity; and gear means coupling said stepping motor means to said platen means, said gear means having a gear ratio to provide for movement of said platen for a distance equal to one-half said number of increments which constitute a line space when said stepping motor is driven by said alternate energization of said poles said predetermined number of steps which constitute said natural detent
- a paper feed system for a printing device in which the line spacing is a predetermined distance comprising:
- a rotatable platen for receiving and feeding paper to be printed upon, said platen being adapted for both manual rotation and motor-controlled rotation with a predetermined number of motor-controlled rotational increments providing movement of said paper through said predetermined distance
- a stepping motor coupled to said platen through gear means for achieving said motor-controlled incremental rotation of said platen
- said motor having a plurality of rotor poles and a plurality of stator poles, said stator poles being coupled to means for alternately changing their polarity when said platen is motor-controlled to thereby produce changes in the orientation in the stator field and incremental rotation of said platen, said stator poles being continuously energized with a constant polarity when rotation of said platen is achieved by manual rotation of said rotor poles, said motor having a natural electromagnetic detent for a predetermined fraction of said predetermined number of rotational increments,
- said gear means having a gear ratio such that said natural detent occurs when said platen has been manually rotated a distance equal to said fraction of said predetermined number of rotational increments of said platen needed to move said paper through said predetermined distance when said platen is motor-controlled.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Character Spaces And Line Spaces In Printers (AREA)
- Handling Of Sheets (AREA)
Abstract
A paper feed system for a high-speed printer in which a stepping motor drives the platen through a gear train which provides for a one-half line space movement of the platen for every four steps of the stepping motor, the stepping motor having a natural detent when its rotor is manually moved four steps.
Description
United States Patent 1191 1111 3,902,584 Lee et a]. 11 Sept. 2, 1975 [54] PAPER FEED SYSTEM FOR HIGH-SPEED 3,272,303 9/ 1966 Pohl 197/114 PRINTER 3,583,540 6/1971 Bernard 197 133 x 3,618,738 1l/l971 Boyatt et a]. 197/127 X Inventors: Sen Lin ak n na s 3,643,776 2/1972 Tanaka 197 114 Castro Valley, both of Calif. 3,656,041 4/1972 Bonzano 197/133 X 3,754,63 8 973 W 7 [73] Assignee: Xerox Corporation, Stamford, 1 ll ang et a1 19 I] R Conn OTHER PUBLIICATIONS [22] Filed: Nov. 7, 1973 Stepper Motors Philips Product News, A. W. Haydon Co. [2]] Appl. No.: 413,592
Related US. Application Data Continuation of Ser. No. 229,446, Feb. 25, 1972, abandoned.
US. Cl. 197/114 R; 197/133 R Int. Cl B41j 19/76 Field of Search 197/1, 114 R, 127, 133 R,
197/114 A; 310/49; 27l/DIG. 3,109,114
[56] References Cited UNITED STATES PATENTS 2,844,743 7/1958 Watson 310/49 X 3,174,064 3/1965 Muller 310/49 X Primary ExaminerEdgar S. Burr Assistant ExaminerR. T. Rader Attorney, Agent, or FirmJames J. Ralabate; Terry J. Anderson; Leonard Zalman [57] ABSTRACT A paper feed system for a high-speed printer in which a stepping motor drives the platen through a gear train which provides for a onehalf' line space movement of the platen for every four steps of the stepping motor, the stepping motor having a natural detent when its rotor is manually moved four steps.
4 Claims, 3 Drawing Figures PAPER FEED SYSTEM FOR HIGH-SPEED PRINTER This is a continuation of application Ser. No. 229,446, now abandoned. filed Feb. 25, 1972.
BACKGROUND OF THE INVENTION The present invention relates generally to a paper feed system for a high-speed printer and more specifically to a system which is compatible with standard manual typing.
Normal office typewriters have their platens detented for one-half the normal line space. When a printer is to be used as an input/output device where it is to be both manually operated by a keyboard" and also to serve as an output device for a computer such line spacing must allow the computer to utilize its inherently greater capability; for example, for plotting or other unusual print formats.
OBJECT AND SUMMARY OF THE INVENTION It is, therefore, an object of this invention to provide a paper feed system for a highspeed printer which while being compatible with standard manual typing is also adaptible to complex computer driven printouts.
In accordance with the above object there is provided a paper feed system for a high-speed printer in which the line spacing is a predetermined distance consisting of a predetermined number of increments. Rotatable platen means receive and feed the paper to be printed upon and include manual rotating means. Stepping motor means is coupled to the platen means for incrementing the platen means. The stepping motor has a plurality of rotor poles and a plurality of stator poles which may be energized to alternately change polarity to thereby produce rotation or stepping of the motor. The motor has a natural detent for a predetermined number of steps when the rotor is manually rotated while the stator poles are continuously energized with a constant polarity. Gear means are provided to couple the stepping motor means to the platen means. The gear means have a gear ratio to provide for movement of the platen for a distance equal to one-half the number of increments which constitute a line space when the stepping motor is driven by the alternate energiza tion of the poles the predetermined number of steps which constitute the natural detent. Thus, when the manual rotating means are actuated and the poles are continuously energized, the natural detent occurs every one-half line space.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a plan view ofa printer embodying the present invention;
FIG. 2 is a cross sectional view taken along line 2-2 of FIG. I; and
FIG. 3 is a simplified schematic of a stepping motor.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG. 1, an overall view of the printer is illustrated. Mounted on frame is a platen 11 with left and right knobs 12 and 13 extending therefrom for rolling the platen. More specifically, knobs 12 and 13 are coupled to a shaft 14 which extends through the platen. The shaft is mounted for rotation on frame I0.
A carriage 15 is mounted for linear movement on rods 16 and 17 and includes a rotary printing wheel having type elements and a hammer assembly for striking a selected type element for printing on paper carried on platen ll. Carriage 15 also includes a ribbon cartridge 18 having an inked ribbon which is interposed between a type element and the paper to be printed upon.
Movement of carriage 15 along the line of printing is accomplished by a motor 21 which is coupled to the carriage by cable system 22. Motor 21 has mounted on one end of its shaft a transducer 23 which consists of two disks for providing position signals which are used in a servo system to provide incremental movement of carriage 15. Details of such transducer and its associated servo system are claimed in a copending application Ser. No. 157,283 filed June 28, 1971, entitled Apparatus For the Measurement of Relative Velocity Between Two Relatively Movable Members, in the name of Andrew Gabor and assigned to the present assignee. Overall details of the printer itself including the carriage 15 are disclosed and claimed in a copending application Ser. No. 229,314 filed Feb. 25, 1972, entitled High-Speed Printer With Intermittent Print Wheel and Carriage Movement in the name of Andrew Gabor and assigned to the present assignee.
To provide for paper feed, a stepping motor 24 is coupled to the shaft 14 by a gear train 26. Stepping motor 24 has mounted on its slhaft a small pinion gear 27 which drives a larger gear 28 mounted on a shaft 29 for rotation on frame 10 which in turn drives a gear 31 mounted on shaft 14 which is also the shaft for platen ll. Stepping motor 24 is of the type as illustrated in FIG. 3 having two fixed poles 32 and 33 here designated S and N respectively and a rotor 34 having a number of rotatable poles; in this specific case, six. In a stepping motor of the type used in the present invention it is apparent that one step is one-half the distance of rotation between adjacent poles of opposite polarity. This is because the fixed poles 32 and 33 alternately change polarity in order to provide the stepping movement, that is, the polarities reverse alternately with winding 33 changing polarity first, followed by a reversal of'the polarity of winding 32, with the sequence continuing with winding 33 changing polarity and then winding 32 changing polarity. Thus, assuming a clockwise rotation of rotor 34 if the fixed pole 33 changes polarity, the resultant field will have a south pole between poles 32 and 33 and this resultant field will attract the north pole of the rotor segment between poles 32 and 33, thereby causing a clockwise rotation of rotor 34. With further changes in the polarity of windings 32 and 33, the resultant field of the stator winding will change direction resulting in further clockwise rotation of rotor 34.
It is also apparent from examination of FIG. 3 that a stepping motor of the type used in the present invention has a natural detent of four steps. Assuming the continuous cnergization of the poles 32 and 33 as illustrated and the manual rotation of rotor 34, the rotor must be rotated clockwise four steps before a rotor pole of the correct polarity will line up with the resultant field of the stator. Thus, a natural detent occurs each four steps of the rotor.
Thus. in accordance with the invention the gear train 26 provides for movement of the platen 11 one-half of the nominal line spacing for four steps of the stepping motor 24. In other words, the platen II is moved four increments for each one-half line space. This provides a natural detent of one-half line space when the knobs l2 and 13 are rotated by the operator of the printer.
In the preferred embodiment the stepping motor is of the type which may be purchased from the A. W. Haydon Company of Waterbury, Conneticut under Model No. IDOS. A motor of this type has 48 steps to the revolution. Also in the preferred embodiment, since the present printer would be used in the same manner as a standard typewriter and the standard typewriter halfline space is one-twelfth inch, there will be 48 increments per inch of circumferential platen movement. The gear train shown in FIG. 2 thus provides for 1 inch of movement of the periphery of the platen 11 for one revolution of shaft 27. The representational stepping motor of FIG. 3, which has I2 steps per revolution, could theoretically be used but it is found that 48 steps provides for more advantageous gear ratios.
Thus, the present invention provides a paper feed system for a high-speed printer which is compatible with standard manual typing for providing a one-half line detent but is adaptable to a computer driven output device since the stepping motor may be driven in one-eighth line increments thus providing a great number of increments per inch for plotting and similar purposes.
We claim:
1. A paper feed system for a high-speed printer in which the line spacing is a predetermined distance consisting of a predetermined number of increments comprising: rotatable platen means for receiving and feeding paper to be printed upon, said platen means having manual rotating means; stepping motor means coupled to said platen means for incrementing said platen means said stepping motor having a plurality of rotor poles and a plurality of stator poles which may be energized to alternately change polarity to thereby produce rotation or stepping of said motor having a natural detent for a predetermined number of steps when said rotor is manually rotated while said stator poles are continuously energized with a constant polarity; and gear means coupling said stepping motor means to said platen means, said gear means having a gear ratio to provide for movement of said platen for a distance equal to one-half said number of increments which constitute a line space when said stepping motor is driven by said alternate energization of said poles said predetermined number of steps which constitute said natural detent whereby when said manual rotating means are actuated and said poles are continuously energized said natural detent occurs every one-half line space.
2. A system as in claim 1 where said line spacing is one-sixth inch, said one-half line spacing is one-twelfth inch and said number of steps per revolution is 48.
3. A system as in claim 1 where eight increments constitute a line space, four increments one-half line space and said natural detent occurs every four steps,
4. A paper feed system for a printing device in which the line spacing is a predetermined distance comprising:
a rotatable platen for receiving and feeding paper to be printed upon, said platen being adapted for both manual rotation and motor-controlled rotation with a predetermined number of motor-controlled rotational increments providing movement of said paper through said predetermined distance,
a stepping motor coupled to said platen through gear means for achieving said motor-controlled incremental rotation of said platen, said motor having a plurality of rotor poles and a plurality of stator poles, said stator poles being coupled to means for alternately changing their polarity when said platen is motor-controlled to thereby produce changes in the orientation in the stator field and incremental rotation of said platen, said stator poles being continuously energized with a constant polarity when rotation of said platen is achieved by manual rotation of said rotor poles, said motor having a natural electromagnetic detent for a predetermined fraction of said predetermined number of rotational increments,
said gear means having a gear ratio such that said natural detent occurs when said platen has been manually rotated a distance equal to said fraction of said predetermined number of rotational increments of said platen needed to move said paper through said predetermined distance when said platen is motor-controlled.
Claims (4)
1. A paper feed system for a high-speed printer in which the line spacing is a predetermined distance consisting of a predetermined number of increments comprising: rotatable platen means for receiving and feeding paper to be printed upon, said platen means having manual rotating means; stepping motor means coupled to said platen means for incrementing said platen means said stepping motor having a plurality of rotor poles and a plurality of stator poles which may be energized to alternately change polarity to thereby produce rotation or stepping of said motor having a natural detent for a predetermined number of steps when said rotor is manually rotated while said stator poles are continuously energized with a constant polarity; and gear means coupling said stepping motor means to said platen means, said gear means having a gear ratio to provide for movement of said platen for a distance equal to one-half said number of increments which constitute a line space when said stepping motor is driven by said alternate energization of said poles said predetermined number of steps which constitute said natural detent whereby when said manual rotating means are actuated and said poles are continuously energized said natural detent occurs every one-half line space.
2. A system as in claim 1 where said line spacing is one-sixth inch, said one-half line spacing is one-twelfth inch and said number of steps per revolution is 48.
3. A system as in claim 1 where eight increments constitute a line space, four increments one-half line space and said natural detent occurs every four steps.
4. A paper feed system for a printing device in which the line spacing is a predetermined distance comprising: a rotatable platen for receiving and feeding paper to be printed upon, said platen being adapted for both manual rotation and motor-controlled rotation with a predetermined number of motor-controlled rotational increments providing movement of said paper through said predetermined distance, a stepping motor coupled to said platen through gear means for achieving said motor-controlled incremental rotation of said platen, said motor having a plurality of rotor poles and a plurality of stator poles, said stator poles being coupled to means for alternately changing their polarity when said platen is motor-controlled to thereby produce changes in the orientation in the stator field and incremental rotation of said platen, said stator poles being continuously energized with a constant polarity when rotation of said platen is achieved by manual rotation of said rotor poles, said motor having a natural electromagnetic detent for a predetermined fraction of said predetermined number of rotational increments, said gear means having a gear ratio such that said natural detent occurs when said platen has been manually rOtated a distance equal to said fraction of said predetermined number of rotational increments of said platen needed to move said paper through said predetermined distance when said platen is motor-controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US413592A US3902584A (en) | 1972-02-25 | 1973-11-07 | Paper feed system for high-speed printer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22944672A | 1972-02-25 | 1972-02-25 | |
| US413592A US3902584A (en) | 1972-02-25 | 1973-11-07 | Paper feed system for high-speed printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3902584A true US3902584A (en) | 1975-09-02 |
Family
ID=26923309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US413592A Expired - Lifetime US3902584A (en) | 1972-02-25 | 1973-11-07 | Paper feed system for high-speed printer |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3902584A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4044882A (en) * | 1974-09-20 | 1977-08-30 | Siemens Aktiengesellschaft | Apparatus for moving a printer carriage |
| FR2359708A1 (en) * | 1976-07-26 | 1978-02-24 | Siemens Ag | DEVICE FOR ADJUSTING THE POSITION OF THE WRITING ON A FORM PRINTED USING A PRINTER AND IN PARTICULAR A TELESCRIPTER |
| US4160606A (en) * | 1974-09-27 | 1979-07-10 | Honeywell Information Systems Italia | Paper feed mechanism for multiple copy printer |
| EP0251776A2 (en) * | 1986-07-01 | 1988-01-07 | Oki Electric Industry Company, Limited | Method of controlling a line-feed stepping motor in a printer and a driver circuit therefor |
| US4971466A (en) * | 1983-05-24 | 1990-11-20 | Canon Kabushiki Kaisha | Printing apparatus having a rotatable member rotatable in incremental steps smaller than the pitch of a detent gear and including means for accurately retaining the rotatable member at a predetermined position when the detent mechanism is inoperable |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2844743A (en) * | 1957-05-28 | 1958-07-22 | James P Watson | Detent mechanisms |
| US3174064A (en) * | 1959-07-23 | 1965-03-16 | Ringsdorff Werke Gmbh | Means for braking a rotatable element |
| US3272303A (en) * | 1965-02-10 | 1966-09-13 | Pohl Carl | Typewriter control apparatus |
| US3583540A (en) * | 1968-05-10 | 1971-06-08 | Honeywell Inc | X{14 y web translating apparatus |
| US3618738A (en) * | 1969-11-19 | 1971-11-09 | Ibm | Vertical paper feed for a drafting typewriter |
| US3643776A (en) * | 1967-12-20 | 1972-02-22 | Ricoh Kk | Line space adjustment device for use with typewriter |
| US3656041A (en) * | 1969-07-17 | 1972-04-11 | Honeywell Inf Systems | Apparatus for controlling the feeding of paper in high-speed printers |
| US3754631A (en) * | 1971-04-01 | 1973-08-28 | Wang Laboratories | Positioning typewriter |
-
1973
- 1973-11-07 US US413592A patent/US3902584A/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2844743A (en) * | 1957-05-28 | 1958-07-22 | James P Watson | Detent mechanisms |
| US3174064A (en) * | 1959-07-23 | 1965-03-16 | Ringsdorff Werke Gmbh | Means for braking a rotatable element |
| US3272303A (en) * | 1965-02-10 | 1966-09-13 | Pohl Carl | Typewriter control apparatus |
| US3643776A (en) * | 1967-12-20 | 1972-02-22 | Ricoh Kk | Line space adjustment device for use with typewriter |
| US3583540A (en) * | 1968-05-10 | 1971-06-08 | Honeywell Inc | X{14 y web translating apparatus |
| US3656041A (en) * | 1969-07-17 | 1972-04-11 | Honeywell Inf Systems | Apparatus for controlling the feeding of paper in high-speed printers |
| US3618738A (en) * | 1969-11-19 | 1971-11-09 | Ibm | Vertical paper feed for a drafting typewriter |
| US3754631A (en) * | 1971-04-01 | 1973-08-28 | Wang Laboratories | Positioning typewriter |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4044882A (en) * | 1974-09-20 | 1977-08-30 | Siemens Aktiengesellschaft | Apparatus for moving a printer carriage |
| US4160606A (en) * | 1974-09-27 | 1979-07-10 | Honeywell Information Systems Italia | Paper feed mechanism for multiple copy printer |
| FR2359708A1 (en) * | 1976-07-26 | 1978-02-24 | Siemens Ag | DEVICE FOR ADJUSTING THE POSITION OF THE WRITING ON A FORM PRINTED USING A PRINTER AND IN PARTICULAR A TELESCRIPTER |
| US4195940A (en) * | 1976-07-26 | 1980-04-01 | Siemens Aktiengesellschaft | Line control for platen printing devices |
| US4971466A (en) * | 1983-05-24 | 1990-11-20 | Canon Kabushiki Kaisha | Printing apparatus having a rotatable member rotatable in incremental steps smaller than the pitch of a detent gear and including means for accurately retaining the rotatable member at a predetermined position when the detent mechanism is inoperable |
| EP0251776A2 (en) * | 1986-07-01 | 1988-01-07 | Oki Electric Industry Company, Limited | Method of controlling a line-feed stepping motor in a printer and a driver circuit therefor |
| US4769585A (en) * | 1986-07-01 | 1988-09-06 | Oki Electric Industry Co., Ltd. | Method of controlling a line-feed stepping motor in a printer and a driver circuit therefor |
| EP0251776A3 (en) * | 1986-07-01 | 1989-08-30 | Oki Electric Industry Company, Limited | Method of controlling a line-feed stepping motor in a printer and a driver circuit therefor |
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