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1. 发明专利

JPS5634485A PAPER FEEDING MECHANISM OF PRINTER 失效
公开(公告)号：JPS5634485A
公开(公告)日：1981-04-06
申请号：JP11048279
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J15/04
摘要： PURPOSE:To feed a paper smoothly without crumpling or jamming the paper, by making a paper passage from a paper inlet to a front of a pinch roller of a paper feeding apparatus narrower than a paper passage from said front to a paper outlet. CONSTITUTION:A width of a paper passage from a paper inlet 4042 of a traverse plate 404 to a pinch roller 420 along which a length of printing paper will be fed is kept at a certain width by a platen lever 403 slightly wider than that of the printing paper. The width of the paper passage beyond the pinch roller 420 is not constrained by the platen lever 403, so that transverse movement of the printing paper PP is not ristricted. By making the paper passage from the front of the pinch roller to the paper outlet wider than the paper passage from the paper inlet 4042 to the pinch roller front, the printing paper PP can move more freely because of alpha

2. 发明专利

JPS5634476A PRINTER 失效
公开(公告)号：JPS5634476A
公开(公告)日：1981-04-06
申请号：JP11049079
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J7/48
摘要： PURPOSE:To eliminate vertical deviation in printing as to each digit and improve the quality of the printing, by locking a printing wheel shaft unmovably throughout a printing period. CONSTITUTION:The rotation of a motor 101 is started in accordance with a printing instruction signal to revolve a type wheel shaft 201 in a forward direction P through gears 104-107, a type wheel shaft foward rotation gear 110 on a cam shaft 103 and a type wheel shaft gear 203. Type wheels 202 are rotated forward by the forward revolution of the type wheel shaft 201. When types for one to-be-printed line are trued up as to all digits, a cam 111 on the shaft 103 and a cam 204 on the type wheel shaft 201 are engaged with each other to stop the type wheels 202 to perform printing. After that, a type wheel shaft backward rotation sector gear 108 on the shaft 103 is engaged with a reset gear 205 to transmit the rotation of the gear 205 to the type wheel shaft 201 to rotate the type wheel revolving shaft 201 in a backward direction Q. As a result, the type wheels 202 are revolved backward. The shaft 103 is stopped by a motor stop signal so that the gears 108, 205 are stopped as they remain engaged with each other.

3. 发明专利

JPS5634475A PRINTER 失效
公开(公告)号：JPS5634475A
公开(公告)日：1981-04-06
申请号：JP11048979
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J7/48
摘要： PURPOSE:To cause always sure type selection, by effecting the type selection process of each printing cycle when the drive motor of a printer has reached a constant speed. CONSTITUTION:A power switch 1 is closed to supply electric power to an electronic circuit etc. as shown at 2, 7. A printing instruction 3 is then applied to supply a voltage 4 to a motor. As a result, a current 5 flows between the terminals of the motor to rotate it. When the rotational frequency 6 of the motor has reached a constant level in a time of 100m sec or more, the all-digit true-up and return of type wheels is completed and a waiting period begins. At that time, a printing OK signal In is produced by a printer to inform that information to be printed can be entered into the printer and that a timing signal T is entered from the printer. After that, the type wheel starts rotating forward and signals T0-T12 are applied to select a type to perform printing 8 and then perform paper feed operation 9. During that time, a timing signal T13 is produced to cut off the current 5 and cause stoppage at the initial part of a type wheel return period.

4. 发明专利

JPS5634459A PRINTER 失效
公开(公告)号：JPS5634459A
公开(公告)日：1981-04-06
申请号：JP11047879
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J1/48 , B41J1/32
摘要： PURPOSE:To restrict play in the axial direction of a type wheel shaft and prevent wrong operation, by engaging a washer in a reference position on a the type wheel shaft and fitting the edge of the washer in a guide groove provided on the stationary member of a printer. CONSTITUTION:A reference position washer 275 (2751 denotes a washer fitting E-ring) is engaged on an end of a type wheel shaft 201 to set a reference position for the pitch of type wheels. The washer 275 is rotatably supported in a guide groove 2701 provided on a protective cover (fixed member) 270 to hold down the play of the type wheels in the axial direction. As a result, the intervals m, m1-m14 between the type wheels 202 are kept accurate and the sides of the wheels are brought into contact with that of a claw 2081 on the tip of a type selector lever to prevent wrong operation.

5. 发明专利

JPS5553580A TYPE RING SELECT SYSTEM PRINTING DEVICE 失效
公开(公告)号：JPS5553580A
公开(公告)日：1980-04-19
申请号：JP12687978
申请日：1978-10-17
申请人： CANON KK , CANON DENSHI KK
发明人： OOKUBO KOUZOU , KOBATA YOSHIHIRO , ASAKURA OSAMU , NISHIKAWA TATSUO
IPC分类号： B41J1/48 , B41J1/32 , B41J7/48
摘要： PURPOSE:To simplify the type ring select mechanism of each figure, and to reduce the cost of parts and assembling cost, by energizing the type select and reset of a specified each plate spring corresponding to each figure type ring by oscillation- controlling a common holder of the each plate spring. CONSTITUTION:Plate springs 5 corresponding to each figure type ring 2 are maintained in parallel with a common holder 6 in comb-teeth-like shapes, and type select pawls 7 opposed to the type rings and armatures 8 facing to an electromagnetic mechanism 9 are held to the free end portions of the several plate spring 5. The type select and reset of each plate spring 5 are energized by oscillation-controlling the common holder 6 of each plate spring. Type select mechanisms are simply constituted, and the cost of parts and assembling cost can be reduced.

6. 发明专利

JPS5528808A PRINTING WHEEL SELECTION TYPE PRINTING APPARATUS 失效
公开(公告)号：JPS5528808A
公开(公告)日：1980-02-29
申请号：JP10135078
申请日：1978-08-19
申请人： CANON KK , CANON DENSHI KK
发明人： OOKUBO KOUZOU , KOBADA YOSHIHIRO , ASAKURA OSAMU , NISHIKAWA TATSUO
IPC分类号： B41J7/48
摘要： PURPOSE:To protect ununiform space between cross line of printing type and error operation of print selection by opposing rotation force transmitting elements adjacent each other through a washer and pinching a wheel part of a printing wheel between rotation force transmitting elements and the washer. CONSTITUTION:Each cross line printing wheel 202 is supported by inserting loosely axial hole H into the outer periphery of a boss 2092 of a pawl (rotation force transmitting element) 209 disposed on each printing wheel axis 201 rotatably with the axis. Cross line pitch a of each cross line printing wheel is secured by width l of boss 2092 of the pawl 209 and thickness of a washer 210 inserted between pawls 209 of each cross line. A wheel part of the each printing wheel is pinched slightly between the pawl 209 and the washer 210. Movement of whole printing wheel along the axis 201 is controlled by a pair of engaging elements rigidly attached to the axis 201 on both sides of prints.

7. 发明专利

JPS5528807A PRINTING WHEEL SELECTION TYPE PRINTING APPARATUS 失效
公开(公告)号：JPS5528807A
公开(公告)日：1980-02-29
申请号：JP10134978
申请日：1978-08-19
申请人： CANON KK , CANON DENSHI KK
发明人： OOKUBO KOUZOU , KOBADA YOSHIHIRO , ASAKURA OSAMU , NISHIKAWA TATSUO
IPC分类号： B41J7/48 , B41J23/00 , B41J23/12
摘要： PURPOSE:To compact and simplize the apparatus and secure operating connection by mounting gear and cam for controlling operation of each parts of the apparatus to a single drive shaft intensively and transmitting power to each parts. CONSTITUTION:Rotation of a motor 101 is transmitted to a cam shaft 103 and all kinds of gear and cam 108-117 for controlling each parts of the apparatus are mounted intensively about the cam shaft 103 as common driving shaft. A gear 108 just turns a printing shaft 201. A cam 109 stops a printing wheel 201 by engaging with a positioning cam 204. A gear 110 turns reversely the printing wheel 201 and a cam 111 stops the printing whel 201. A pair of cam 112, 112 symmetrically positioned detaches a ink roller 501 from each cross printing wheels 202. A pair of cam 113, 113 symmetrically positioned press fits a platen 401 to printing wheels 202. A pair of cam 114, 114 symmetcially positioned deteches the platen 401 from the printing wheels 202. A gear 115 and a cam 116 operates signal generation mechanism 300 and cams 117, 117 vary the pressure of a spring plate 217 engaged with a printing wheel selection lever 208.

8. 发明专利

JPS5634486A PAPER FEEDING MECHANISM OF PRINTER 失效
公开(公告)号：JPS5634486A
公开(公告)日：1981-04-06
申请号：JP11048579
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J15/04
摘要： PURPOSE:To prevent paper jamming and to perform smooth paper feeding, by arranging a member, at a paper insertion side of pinch rollers and paper feeding rollers of a printer, for guiding a length of printing paper between the rollers with the leading edge of the printing paper supported in parallel with an axis of the rollers. CONSTITUTION:In a printer used as an operation result recorder of a recording type small-sized electronic calculator, the printer having a mechanism for feeding a printing paper PP by paper feeding rollers 406 and pinch rollers 420, when the paper is inserted, sometimes the leading edge of the paper will drops beneath a pinch roller shaft 421 to cause the paper to be jammed. To prevent this positively, a projection 4043 is attached to a transverse plate 404 that will guide the printing paper PP from a paper inlet 4042 to pinch rollers 420 and the projection 4043 is located adjacent to the pinch rollers 420 and over the pinch roller shaft 421. Thus when the printing paper is inserted, dropping of the leading edge thereof beneath the pinch roller 421 will be prevented.

9. 发明专利

JPS5634472A SIGNAL DETECTOR FOR PRINTER 失效
公开(公告)号：JPS5634472A
公开(公告)日：1981-04-06
申请号：JP11047379
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J7/48
摘要： PURPOSE:To enhance the reliability of the device, by driving a timing detector through a rotary shaft except for a type wheel shaft and operating a printing OK signal generator through a cam provided on the rotary shaft and through a lever which acts to the cam. CONSTITUTION:The detection disc 115 of a timing detector, which produces for producing a type wheel selection timing signal is driven by a rotary shaft 103 except for a type wheel shaft. A signal corresponding to a type and a motor stop signal are generated by the rotation of the disc 115 following the shaft 103 whenever a type signal producing perforated hole 1151 and a motor signal producing perforated hole 1152 pass by a photo-sensitive element 307. When the notch 1161 of a cam 116 is located at the arm 3041 of a lever 304 ad a result of the rotation of the cam following that of the shaft 103, the lever 304 and the cam 116 are disengaged from each other so that the lever swings by a spring 306 centering a shaft 303 until the lever comes into contact with a stopper 3012 provided on a holder 301. At that time, a permanent magnet 305 is displaced down from the center of a reed switch 302 to cause a printing OK signal generator 302 to produce a printing OK signal.

10. 发明专利

JPS5634469A PRINTER 失效
公开(公告)号：JPS5634469A
公开(公告)日：1981-04-06
申请号：JP11048879
申请日：1979-08-31
申请人： CANON KK , CANON DENSHI KK
发明人： NISHIKAWA TATSUO , OOKUBO KOUZOU , YOSHIDA HIROMI , HASEGAWA YUUICHI , KOBATA YOSHIHIRO
IPC分类号： B41J7/48 , B41J7/00
摘要： PURPOSE:To economize electric power and improve energy efficiency, by controlling power for a type selecting electronic circuit through a reed switch for a printing OK signal. CONSTITUTION:The area of the opening of a cam 116' for controlling a reed switch 302 for generating a printing OK signal is widened to enable operation in a wide range, as shown In-1, although a conventional OK signal is produced during a waiting period In. Since the period of the generation of the printing signal by the reed switch 302 is made slightly longer than that of a timing signal, power for a timing signal generation circuit can be turned on and off by a switch (reed switch 302) which is operated by a printer. As a result, the power for the timing signal generation circuit can be altered as shown at 7-1. Namely, the switch is frequently operated to economize the power.

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