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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

JPS5634494A PRINTER 失效
公开(公告)号：JPS5634494A
公开(公告)日：1981-04-06
申请号：JP11047679
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 , B41J29/12 , B41J29/13 , B41J29/38
摘要： PURPOSE:To prevent erroneous action due to intrusion of dust into a unit printing type selecting mechanism, by covering and protecting the unit printing type selecting mechanism, which selectively stops the rotation of a unit printing type wheel, using a cover body. CONSTITUTION:A printing type selecting lever 28 and an electromagnetic trigger mechanism 220 of a unit printing type selecting mechanism that selectively stops the rotation of a unit printing type wheel 202 are covered and protected by a cover body 270, so that intrustion of dust of printing paper, other fine dust or the like into an armature 213 and yoke comb teeth 2143, 2144 is prevented.

6. 发明专利

JPS5634483A PRINTER 失效
公开(公告)号：JPS5634483A
公开(公告)日：1981-04-06
申请号：JP11048479
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： B41J11/62
摘要： PURPOSE:To prevent a blot or smear of ink and to secure paper feeding, by fixing a comb teethlike paper guide member in front of a platen with respective teeth of said member positioned in the corresponding spaces between unit printing type wheels, and by introducing a length of printing paper between said member and the platen. CONSTITUTION:In a platen mechanism is provided a smear preventing plate (a paper member) 417 that arranges a printing paper PP along a rubber rollers 406, 406, a platen holder 407 and a platen 401, and comblike teeth 4171 of the smear preventing plate 417 will be inserted into the corresponding spaces between units of a printing type wheel group 202 without tuoching to printing type portions when the platen mechanism is rotated to the maximum. Therefore the smear on the printing paper due to ink on printing types that are not desired or ink on portions where no printing type is present when the paper is fed will be prevented. Thus, while the smear preventing plate 417 can serve as a paper guide to arrange the printing paper PP along the platen 401 and the platen holder 407, it can prevent smear on the printing paper and also prevent jamming of the printing paper.

7. 发明专利

JPS5634474A PRINTER 失效
公开(公告)号：JPS5634474A
公开(公告)日：1981-04-06
申请号：JP11047779
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 , B41J29/12
摘要： PURPOSE:To prevent the malfunction of mechanisms due to the infiltration of dust, by shielding and protecting digit type selection levers and their trigger mechanisms with a cover which functions to align the levers. CONSTITUTION:Digit type selection levers 208 for selectively stopping the rotation of digit type wheels 202 and the operating trigger mechanisms 220 of the levers are shielded and protected with a cover 270. Partition guide holes 2702, through which the tip claws 2081 of the levers 208 project, are provided in the front wall of the cover 270 so that the guide holes serve as guides for positioning the levers in their longitudinal direction. The claws 2081 are guided by the guide holes 2702 while the spacing of the claws is restricted. Partition guide slits 2704, through which the rear portions of the levers 208 project, are provided in the rear wall of the cover 270 to guide the levers 280 while restricting their spacings.

8. 发明专利

JPS5634473A SIGNAL DETECTOR FOR PRINTER 失效
公开(公告)号：JPS5634473A
公开(公告)日：1981-04-06
申请号：JP11047479
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 absorb the errors of component parts and the irregularity of accuracy and accurately synchronize a passing type with a corresponding signal, by supporting the timing detection disc of a timing detector so that the installation angle of the disc to a driving shaft can be adjusted. CONSTITUTION:A cam 116 integrated with the cam shaft 103 of a timing detector for applying type selection timing during a type wheel selection period and a timing detection disc 115 having type signal generation perforated holes 1151 and a motor stop signal generating perforated hole 1152 along the peripheral edge of the disc are provided. A fitting screw insertion arc-shaped hole 1153 is opened in the detection disc 115. A screw 1154 is inserted into the hole 1153 to secure the detection disc 115 on a side of the cam 116 so that the installation angle of the disc to the cam can be adjusted. The factors of the errors of the detection disc 115, gears, etc. are absorbed by the adjustment to correct the errors. After the adjustment, the screw 1154 is tightened to integrally couple the detection disc 115 with the cam 116.

9. 发明专利

JPS5712676A SELECTOR FOR CHARACTER 失效
公开(公告)号：JPS5712676A
公开(公告)日：1982-01-22
申请号：JP8817680
申请日：1980-06-27
申请人： CANON KK , CANON DENSHI KK
发明人： OOKUBO KOUZOU , HASEGAWA YUUICHI
IPC分类号： B41J7/48
摘要： PURPOSE:To improve the corrosion resistance and abrasion resistance of a yoke and an armature, and to hold a type selective lever positively by each constituting the yoke and the armature with stainless steel in the character selector for a small-sized electronic printer. CONSTITUTION:When a type ring selective lever 208 is at stand-by condition, the armature 213 is attracted to the yokes 2141, 2142 by the magnetic force of a permanent magnet 215 against the spring force of a leaf sprig 217, magnetic flux in the yokes 2141, 2142 is denied by conducting coils 2161, 2162 and the type of a type ring 202 is selected. Since the qualities of materials of the upper and lower yokes 2141, 2142 and the armature 213 consist of magnetic stainless steel at that time, corrosion resistance and the abrasion resistance of attracting surfaces are excellent, and the stand-by condition of the type selective lever can be held positively.

10. 发明专利

JPS5712675A SELECTOR FOR CHARACTER 失效
公开(公告)号：JPS5712675A
公开(公告)日：1982-01-22
申请号：JP8817580
申请日：1980-06-27
申请人： CANON KK , CANON DENSHI KK
发明人： OOKUBO KOUZOU , HASEGAWA YUUICHI
IPC分类号： B41J7/48
摘要： PURPOSE:To remove the abrasive powder on attracting surfaces, and to improve the reliability and durability of the character selector by mounting a permanent magnet for attracting magnetic powder in the vicinity of the attracting surfaces of a yoke and an armature in the character selector for a small-sized electronic printer. CONSTITUTION:When a type ring selective lever 208 is at stand-by condition, the armature 213 is attracted to the yokes 2141, 2142 by the magnetic force of a permanent magnet 215 against the spring force of a leaf spring 217, but magnetic flux in the yokes 2141, 2142 is denied by conducting coils 2161, 2162 and the type A of a type ring 202 is stopped selectively. In this case, magnetic abrasive powder on the attracting surfaces formed by repeating attracting and release among the armature 213 and the yokes 2141, 2142 is attracted and removed by means of the permanent magnet 230 for attracting the magnetic powder mounted onto a substrate 251 for wiring. A flexible plastic rubber sheet magnet is preferable on handling as the permanent magnet 230.

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