DK145371B - Press unit - Google PatentsPress unit Download PDF
- Publication number
- DK145371B DK145371B DK242573A DK242573A DK145371B DK 145371 B DK145371 B DK 145371B DK 242573 A DK242573 A DK 242573A DK 242573 A DK242573 A DK 242573A DK 145371 B DK145371 B DK 145371B
- Prior art keywords
- Prior art date
- 239000000969 carriers Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 3
- 230000003213 activating Effects 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims description 2
- 238000000034 methods Methods 0.000 description 15
- 230000000875 corresponding Effects 0.000 description 9
- 230000002093 peripheral Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
- 230000001360 synchronised Effects 0.000 description 2
- 281000183245 Barnes Group companies 0.000 description 1
- 281000153249 Citizen Holdings companies 0.000 description 1
- 230000037250 Clearance Effects 0.000 description 1
- 230000035512 clearance Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000976 inks Substances 0.000 description 1
- 239000000696 magnetic materials Substances 0.000 description 1
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J9/00—Hammer-impression mechanisms
- B41J9/02—Hammers; Arrangements thereof
- B41J9/10—Hammers; Arrangements thereof of more than one hammer, e.g. one for each character position
- G06—COMPUTING; CALCULATING; COUNTING
- G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
- G06C11/00—Output mechanism
- G06C11/04—Output mechanism with printing mechanisms, e.g. for character-at-a-time or line-at-a-time printing
- G06C11/06—Output mechanism with printing mechanisms, e.g. for character-at-a-time or line-at-a-time printing having type hammers
(12) PROCEDURE WRITING ου 145371 B
DIRECTORATE OF THE PATENT 06 BRAND
(21) Application No. 2425/73 (51) IntCI.3 B 41 J 9/32 (22) Submission Day 3 · 1973 // B 41 J 1/34 (24) Running Day 3 * May 1973 B 41 J 9/10 (41) Aim. available Nov. 5 1973 (44) Posted 8 Nov. 1982 (86) International application no.
(86) International Filing Day (85) Continuation Day - (62) Application No. ~
(30) Priority May 4, 1972, 44378/72, JP
(71) Applicant CITIZEN WATCH COMPANY LIMITED, Tokyo, JP.
(72) Inventor Shohachl Nlhlra, JP.
(74) International Patent Bureau.
(54) Pressure apparatus.
BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a printing apparatus comprising a type wheel having types in a number of slots extending along the periphery of the type wheel, the type wheel being actuated to rotate about a shaft, whereby the types are moved past a printing position where they are adjacent to a record carrier, activatable means for each type column for pressurizing desired types against the record carrier or for arresting desired types relative to the record carrier moving against them, the printing apparatus further having type selector means with an electric pressure control circuit for selecting a particular type in each of the type wheels columns of a particular type with the type wheel type position and thereby functionally coupled slot selector means.
Pressure apparatus is known which uses electromagnetic hammers, each having a head covering several slots on a type wheel. As each hammer covers 2 145371 several types of slots, the number of hammers and thus the number of actuating or triggering means is reduced. The type characters in each slot are arranged at different stages relative to types in adjacent columns to print a character in a printing process in which the electromagnetic hammers are activated a number of times to print a line.
In said known printing apparatus, the individual types in each slot must have an angular distance with an angle equal to the phase difference between the two outer slots covered by a hammer in order to press one character during a process. Accordingly, in the printing apparatus, where each hammer covers n slots, the diameter of the type wheel is increased n times compared to a conventional type wheel, where there are hammers for each slot.
Also, the time required for printing a line is increased n times, the hammer having to operate n times for a line. Furthermore, a system of this type is not suitable for use in simultaneous printing of all characters in a line.
An object of the invention is to provide a printing apparatus which, in connection with a simple construction, allows a reduction of the number of electromagnetic actuating or release means without increasing the type wheel diameter and without reducing the printing speed, and which can be used for simultaneous printing of all characters. in a line.
To achieve this, an apparatus of the kind according to the invention according to the invention is peculiar in that the means for applying pressure or for arranging types in the printing position from an inactive starting position are activatable to an active position, where they act on or arrest a type of pressure. the pressure position, under the influence of the slit selector means, which is constituted by a guide roller, which rotates in a predetermined relation to the rotation of the type wheel and along its circumference has actuation and release sections next to each type slot for briefly activating the individual pressure actuating and arresting means, respectively, and simultaneously acting from the type selector means via electromagnetic trigger means, each serving a group comprising two or more pressure actuators or arresting means and controlled by the pressure control circuit, which, in addition to the pressure signals, also receives selector signals produced by the type selector switches operably coupled with the slit selector means. means, in which only the pressure actuating or annealing means are activated to the active position which is simultaneously influenced by both the slit selector means and the electromagnetic triggering means.
Other objects and advantages of the invention will become apparent from the following description wherein the invention is explained with reference to the drawing, in which 1 is a perspective view of an embodiment of the invention; FIG. 2 is a partial view of the embodiment of FIG. 1 is a side view of FIG. Fig. 3 is a side view of a second embodiment of the invention viewed from the side; Fig. 4 is a side view of a further embodiment of the invention viewed from the side; 5 is a perspective view of the embodiment of FIG. 4, and FIG. 6 is a perspective view of another embodiment of the invention.
In the drawing FIG. 1, reference 1 denotes a type wheel having a number of digit types. The angular distance between adjacent types in each slot can be determined as a small angle at which a type hammer head 7a will not touch adjacent types. The types are arranged in groups, each comprising three slots, and the phase difference between adjacent slots is one third of the aforementioned angle. The type wheel 1 is supported on a rotatable shaft 2, at one end of which is attached a type gear 3, which is engaged by a real wheel; The sprocket 4 is integral with a sprocket 5 which engages one reset sprocket 6. The gear ratios used are such that reset sprocket 6 completes rotation for each type part angle of the type sprocket 1. Reference 7 denotes a number of hammers mounted rotatable on a hammer shaft 8 one before each slot. Each hammer has at one end a hammer head 7a facing a type on the type wheel 1, a reset projection 7b and a locking projection 7c formed at the other end and it is biased in a clockwise direction by a hammer spring 9. The hammer spring 9 has dimensions such that its spring portion assumes an unstretched state, as the associated hammer head 7a strikes the type on type wheel 1 such that no spring force is exerted on hammer 7 when the head is in contact with the type. The drawing shows a clearance between the hook of the hammer 7 and the hammer spring 9, so that the escape of the hammer is not hampered until it hits the type. Reference 10 denotes anchors found for every three hammers 7 for three types in each group. They are mounted on an anchor shaft 11 and each of them is biased against the holding protrusion 7c by means of an anchor spring 13 which is attached at one end to a magnetic carrier plate 12. Normally, each anchor is engaged with the holding protrusion 7c, so that the hammer spring 9 kept in a tense state. The reference 14 denotes a reset gear wheel shaft having a selector timing control disk 15 attached to one end of the shaft and a reset roller 16. An end timing control disk 17 for generating a signal for each rotation of the shaft 2 is attached thereto, and a timing signal detector 18 is provided. which is connected to the timing dial. Selector timing control disk 15 is positioned opposite a selector timing signal detector 19. Selector timing control disk 15 is made of a magnetic material and has six peripheral projections 15a such that the detector 19 detects flux changes as it passes through those projections so that six signals are generated for each turn of the dial. The reset roller 16 is arranged to abut against the reset projection 7b on each hammer 7, and it has for each slot a guide portion having a maximum diameter fixing section 16a covering an angle greater than 240 °, a minimum diameter release section 16b and a reset section 16c which covers an angle of less than 120 °. There is a phase difference of 120 ° between adjacent control parts of the reset wheel, so that the phase difference of the reset wheel corresponds to the phase difference of the types on the type wheel. When a type of the press wheel comes into the pressure position, the projection 7b is located outside the section 16b of the wheel 16, see fig. 2nd
Reference 20 denotes electromagnets individually associated. the respective anchors 10 and mounted on the magnetic carrier plate 12. The reference 21 denotes a ribbon, 22 denotes a record sheet, and 23 denotes a sheet feed roll. These parts are mounted in a well-known manner. The reset gear 6 is driven by a motor not shown, and it is rotated counterclockwise as shown by an arrow.
During operation, the end-time control disk 17 and the end-time signal detector 18 cooperate to produce end-time signals, and the signals are detected by means of a pressure control circuit (not shown), so that the pressure apparatus and the pressure control circuit are synchronized in a well-known manner. The selector time control dial 15 and the selector time signal detector 19 cooperate to produce selector time signals.
From each selector time signal, a tire can be read out which type in which slot on the type wheel 1 comes in the pressure position.
Upon arrival of a pressure signal, the pressure control circuit serves to detect whether or not a particular type in a particular slot reaches the pressure position and, upon detecting a correct signal, activates the corresponding electromagnet 20.
Six signals produced for each rotation of the reset gear 6 are used to prepare three types of printing in each group. Two consecutive signals are used to operate an electromagnet 20, in that the first signal serves for activation and the subsequent signal serves for deactivation. The last preceding signal is used to control a selected type in the pressure control circuit.
The activated electromagnet 20 attracts the associated anchor 10. When the anchor 10 is pulled, it engages with the holding projections 7c on the associated three hammers 7. However, the hammers 7 are not released, while their reset projections 7b are retained by the arresting means. the cut 16a on the reset roller 16.
During the rotation of the reset wheel, a certain of the three hammers 7, namely the hammer which is next to a type activated in the pressure control circuit, falls on the release section 16b, whereby the associated hammer is pulled under the action of the hammer spring 9 and the hammer head 7a the type in question on the type wheel 1 through the color band 21 and the record sheet 22, so that a digit is printed on the record sheet 22.
When the hammer strikes the type, it is already released from the action of the hammer spring 9, so that, after hitting the type, it springs back and engages the reset section 16c on the continuously rotating reset roller 16. The hammer is thus held in the original prestressed section. position.
Prior to the return of the hammer of the type, the electromagnet 20 has been deactivated so that when the hammer returns to its initial position, the anchor 10 engages the anchor 10 over the holding projection 7c under the influence of the anchor spring 13. As the other two hammers 7 which are not released for movement , is retained in the embodiment shown in FIG. 2, the anchor 10 is at this point in engagement with all three hammers, so that all parts are left in the starting position.
When the type in the next slot arrives at the printing position, the electromagnet 20 is reactivated. Thus, the electromagnet is activated three times for printing certain types in the three slots during a rotation of the type wheel.
In this way, the printing of a line is completed after the emergence of a printing command during a rotation of the type wheel 1, and then the ribbon 21 is advanced in a known manner, and also the record sheet 22 is advanced by the sheet feed roller 23, thereby completing the entire process for one line.
FIG. 3 shows a side view of another embodiment of the invention with a three-wheel drive structure. T FIG. 3, a step drive wheel 29 is used in place of the reset roller 16 in the embodiment shown in Figures 1 and 2, and some associated parts are also replaced by others. In this embodiment, the hammer 7 has neither a reset protrusion 7b nor a retaining protrusion 7c, and it is not biased with a hammer spring 9, but is biased in the opposite direction by a spring 25. The hammers 7 are engaged by a hammer stopper 26, extending parallel to the axis of rotation 2.
Reference 27 denotes hammer drive means which are individually attached to respective hammers 7 and each hammer drive is biased by a spring 28 in a direction away from the type wheel 1 and the step drive 29. Furthermore, each hammer drive means is held by the hammer stop 26, and also its vertical movement and back movement are limited by a pair of guides 30 with little leeway for flutter motion.
The hammer driver 27 has a driven projection 27a and a trigger projection 27h. The trigger projections 27b of three hammer drive means 27 engage an anchor 10.
The drive wheel 29 is mounted on the reset pinion shaft 14 and has drive projections 29a with a phase difference of 120 ° according to the phase difference of the types on the type wheel 1. The electromagnets 20 correspond to the electromagnets in the embodiment described above except their orientation. The type wheel 1, the type roller gear 3 and other parts all correspond to the parts in the embodiment shown in figures 1 and 2.
When, during operation, a particular type comes to the printing position tip, the corresponding electromagnet 20 is activated to attract the associated anchor 10 to the electromagnet 20 in a similar manner as in the embodiment shown in Figures 1 and 2. Since the trigger protrusions 27b of the three hammer drive means 27 engage with the anchor 10, these hammer drive means 27 are tilted downwardly so that their drive protrusions 27a enter the path of the drive protrusions 29a of the drive roller 29. Immediately thereafter, only a particular drive protrusion 29a engages with a drive step 27a on the corresponding hammer drive means 27, but for other slots with other phases no engagement is established. Thus, the hammer driver 27 for the particular slot strikes the associated hammer 7, and it moves with the hammer until printing of the particular type, after which these parts spring back.
Prior to this recoil, the electromagnet 20 has already been demagnetized and the drive protrusion 29a on the drive roller 29 exits the path of the drive step 27a so that it has no effect on the subsequent return of the hammer by the spring 25 or on the return of the hammer drive means 27 by of the spring 28.
In the aforementioned manner, the printing process is carried out in a similar manner as in the aforementioned embodiment shown in Figures 1 and 2 to complete the entire process.
Figures 4 and 5 show a further embodiment of the invention with a concurrent line printing construction.
Reference 31 denotes a pivot shaft coupled to a selector roller 32 through a not shown gear exchange for rotation in the same direction. Selector roller 32 completes a rotation for movement of type wheel 33 on a pitch. The selector roller 32 has projections 32a for the individual slots and adjacent projections are offset by 120 °.
The type wheel 33 has independent wheels for the individual slots. These wheels have similar projections 33a and types 33b with distances on the same pitch.
Furthermore, the wheels have reset ends 33c which are located at different stages for the individual slots and the wheels are frictionally coupled to the pivot shaft 31. Furthermore, selector pole 34 for the individual slots is provided which are biased by springs 35 in such a way that they engage a projection 33a on the type wheel 33. Each selector pile 34 has a projection 34a which engages a corresponding end 36a of an associated trigger arm 36. The trigger arm has a groove 36b at the other end by which an anchor 10 are engaged. Each trigger arm 36 has a central slot 36c extending perpendicular to the longitudinal direction of the trigger arm. A trigger arm guide 37 extends parallel to the pivot shaft 31 with the slots 36c to prevent movement of the trigger arms 36 biased clockwise by trigger arm springs 38 so that the ends 36a engage the projections 34a of the associated selector pawl 34. The reference 39 denotes a selector pallet with a reset edge 39a which engages the reset ends 33c.
In this embodiment, there is also an electromagnet 20 for every three slots. Three slots in a group are made up of three different type wheels. The three type wheels are arranged in such a way that the phase difference between types 33b is one third of the type division.
This corresponds to the phase difference of the projections 32a on the selector roller 32.
The pivot shaft 31 is driven by a drive member not shown to perform a reciprocal end rotation through approx. 180 ° during a line printing period. The reference 40 denotes a pressure support coupled to the aforementioned drive means for performing a reciprocating movement against the type wheel 31. The reference 41 denotes a pawl release rod which is also coupled to the aforementioned drive means to effect rotation of the selected pawls 34.
When the drive is actuated in response to a pressing command, the pivot shaft 31 is rotated from the indicated position in the clockwise direction, and the type wheel 33 is also rotated in the clockwise direction, as is also the selector roller 32 in this direction.
When a particular type in a particular slot during this rotation comes to the actuating position relative to the selector pawls 34, and the corresponding projection 32a on the selector roller 32 is adjacent the corresponding trigger arm 36, the aforementioned and in connection with the embodiment of FIG. . 1, the pressure control circuit referred to in paragraph 1 activates the corresponding electromagnet 20 for the purpose of attracting the associated anchor 10. As a result, the three trigger arms 36 which engage the anchor are activated. However, in slots other than the specified one, none of the projections 32a on the selector roller 32 are located adjacent to the respective trigger arms 36, so that these trigger arms 36 simply pivot about their end 36a and are not released from the associated selector pole 34. The trigger arm 36 for however, the given slot rotates about the projection 32a on the selector roller 32 so that its end portion 36a is released from the projection 34a on the associated selector pile 34. As a result, the selected pawl 34 for the given slot is rotated by the associated spring 35 counterclockwise. for engagement with a protrusion 33a on the type wheel 33 in the given slot. The type wheel 33 is thus locked by the pawl, and it consequently slides on the pivot shaft 31 to hold the given type in a position next to the printing support 40. This sequence of operation takes place for each slot, so that certain types of particular slots are all held in position. in this way, the type selection process is terminated. At the completion of the forward movement of the pivot shaft 31, the aforementioned compressive action of the support 40 is then carried out by the drive means for printing on the record sheet 22.
After printing, the support 40 is retracted while the pawl release rod 41 is simultaneously moved toward the selected posts 34 to return them to the initial position, whereby the trigger arms 36 engage the projections 34a of the returned selector pawl 34 to restore the original state. Thereafter, the release rod 41 is returned to the initial position, whereupon the pivot shaft 31 rotates in the opposite direction, i. counterclockwise. Hereby, the type wheel 33 is rotated counterclockwise until its reset end 33c abuts the reset edge 39a on the selector guide 39 and is held in the initial position. At the same time, the ink ribbon 21 and the record sheet 22 are appropriately advanced so that the printing process for one line is completed.
Although the type wheel in the embodiment shown above and in Figures 4 and 5 is frictionally coupled, it will be appreciated that the invention can also be used effectively in connection with a known printing system for simultaneous printing of a line in which the type wheel is rotated in one direction by means of of a built-in coil spring, and in a known printing plant for simultaneous printing of a line where the selector pawls are coupled with a reciprocating sector gear.
FIG. 6 shows a perspective view of a further embodiment of the invention with certain parts removed. The construction is similar to that of FIG.
1, but the function differs therefrom in a manner to be explained below.
For simplification of the explanation, parts which are similar or similar to those in FIG. 1, bearing the same reference numerals. The type wheel 1 is fixed to a pivot shaft 2. The types 1a along the periphery of the type wheel 1 are arranged in the same phase. On the pivot shaft 2 is attached a drawing pulse disc 42 with peripheral tabs corresponding to each of the respective rows of types 1a. A character pulse detector 43 is disposed adjacent to the character pulse disk 42. The rows of types 1a on the type wheel 1 and the tabs on the character pulse disk 42 are disposed at a constant interval except for a blank portion spanning a suitable angle, as detailed in FIG. FIG. 6. A disc 44 is also attached to the pivot shaft 2, and this disc is coupled to a disc 45 which is secured to the reset gear shaft 14 by an endless belt 46 extending around these discs. The reset sprocket shaft 14 is arranged to complete one revolution for every three turns of the pivot shaft 2. A reset roller 16 similar to that of FIG. 1 is also attached to the reset pinion shaft 14. However, the opposite ends of the reset pinion shaft 14 differ slightly from the one shown in FIG. 1. More particularly, at one end there is a slit pulse disc 47 with three peripheral tabs next to a slit pulse signal detector 48, and at the other end an end-time control disc 17 with a peripheral tab is attached. There is also an end-time signal detector not shown off the end-time control disk 17. A reset rod 49 is disposed on the motion side of a hammer row 7. Reset rod 49 is attached to an arm 50 which is hingedly mounted on a fixed pin not shown. On the arm 50 there is a cam roller 51. The cam roller 51 is moved by the cam surface of a reset cam 52 attached to the pivot shaft 2.
The operation of this embodiment is described below.
After the start of the printing apparatus, a motor not shown for turning the rotary shaft 2 and the reset gear shaft 14 is activated. When the signal from the end-time disk 17 is connected to a non-displayed pressure control circuit, the printing device and the pressure control circuit are synchronized so that they are ready for a line printing process.
In a similar manner to that of FIG. 1, the signals from the sign pulse disk 42 and from the slit pulse disc 47 are connected to the pressure control circuit, so that a particular type can be compared with respect to the type and gap in the pressure position. In this embodiment, the pivot shaft 2 is arranged to make three turns for each turn of the reset gear shaft 14. This means that one turn of the pivot shaft is associated with each of three release parts 16b of the reset roller 16.
FIG. 6 shows the condition at the beginning of the printing process with the cam roll 51 engaging a recess on the reset cam 52 and with the reset rod 49 separated from the hammer row 7. Immediately after this condition, the reset projection 7b of each hammer 7 falls into a release portion 16b of the reset reel 16 and from the blank portion to the pressure position while performing a revolution. Then, by means of a command from the pressure control circuit, an electrical input signal of a particular type is applied to the corresponding electromagnet 20. Each electromagnet 20 serves three hammers 7, but the hammer engaging a release member 16b can be moved for printing. , and only certain types can be printed, as described above in connection with the embodiment of Fig. 1.
During the aforementioned printing process, when the blank portion of the type wheel 1 will lie next to the hammer row 7, a reset process will occur.
When the cam roller 51 is moved by means of the projection on the reset cam 52, the reset rod 49 causes a simultaneous rotation of the hammers 7. Immediately thereafter, the reset projection 7b of the hammer 7 engages the mounting portion 16a of the roller 16 and the holding projection of the hammer 7 enters. anchor 10, thus ending the reset process.
Then the pivot shaft 2 returns to its initial position. Since the reset pinion shaft 14 has been rotated one-third by this time, other release members 16b of the reset roller 16 arrive at the operative position so that the pressing process for the slot is performed. This process is repeated three times and the reset gear shaft 14 completes a rotation to end the printing of a line.
In the aforementioned embodiment, after being activated for printing, a hammer 7 is freely rotatable about the hammer shaft 8, so that there is a tendency for soiling of the record sheet 22 during this period as a result of the rotation of the type wheel 1. To prevent this from happening. it is convenient to bias the hammer with a weak spring in a direction opposite to the biasing direction of the hammer spring 9 so that the hammer does not touch the record sheet 22 after it has finished printing.
Of course, although the electromagnets 20 in the aforementioned embodiments have only been activated when they have been supplied with a push command input signal, it is also possible to arrange the apparatus so that the electromagnet is normally activated where it is deactivated upon receipt of a push command signal for triggering. of the associated anchor. These two alternatives can be appropriately selected by an appropriate setting of power consumption or by an appropriate choice of circuit design or mechanical means.
As described above, with the invention, using electromagnets used separately for n slits, the peak power consumption of all electromagnets can be reduced to 1 / n of the conventional value. Since the number of electromagnets can be reduced to 1 / n, the apparatus according to the invention can also be designed with a small size. Furthermore, during continuous activation of an electromagnet, the function of a slot cannot be inhibited,
Priority Applications (2)
|Application Number||Priority Date||Filing Date||Title|
|JP4437872A JPS5245249B2 (en)||1972-05-04||1972-05-04|
|Publication Number||Publication Date|
|DK145371B true DK145371B (en)||1982-11-08|
|DK145371C DK145371C (en)||1983-05-09|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|DK242573A DK145371C (en)||1972-05-04||1973-05-03||Press unit|
Country Status (12)
|US (1)||US3848527A (en)|
|JP (1)||JPS5245249B2 (en)|
|CA (1)||CA1004910A (en)|
|CH (1)||CH570269A5 (en)|
|DE (1)||DE2322285C3 (en)|
|DK (1)||DK145371C (en)|
|FR (1)||FR2183281B1 (en)|
|GB (2)||GB1436901A (en)|
|IT (1)||IT987114B (en)|
|NL (1)||NL165114C (en)|
|NO (1)||NO136826C (en)|
|SE (2)||SE390513B (en)|
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|JPS546500Y2 (en) *||1974-01-29||1979-03-27|
|JPS5341566B2 (en) *||1974-09-17||1978-11-04|
|US3973486A (en) *||1974-12-05||1976-08-10||Hycom Incorporated||Printer|
|US4152983A (en) *||1975-06-09||1979-05-08||Canon Kabushiki Kaisha||Printing hammer driving system|
|DE2531852C3 (en) *||1975-07-16||1981-04-23||Tokyo Juki Kogyo K.K., Tokyo, Jp|
|JPS5549256Y2 (en) *||1976-02-12||1980-11-17|
|US4089401A (en) *||1976-10-12||1978-05-16||Scott Thaddeus Leroy||Segmented printout device|
|JPS5477614U (en) *||1977-11-11||1979-06-02|
|JPS54157610U (en) *||1978-04-26||1979-11-02|
|JPS587469B2 (en) *||1978-07-04||1983-02-09||Citizen Watch Co Ltd|
|JPS5828849Y2 (en) *||1978-08-01||1983-06-23|
|DE2836396A1 (en) *||1978-08-19||1980-02-28||Gernot Klaus Brueck||FAST PRINTER|
|JPS5813357B2 (en) *||1978-08-28||1983-03-12||Citizen Watch Co Ltd|
|JPS5460015A (en) *||1978-09-28||1979-05-15||Canon Kk||Typewriter|
|US4483249A (en) *||1979-01-25||1984-11-20||Mitsumi Electric Co., Ltd.||Hammer lock releasing mechanism for a printing device|
|JPS5820374Y2 (en) *||1979-01-25||1983-04-27|
|US4494885A (en) *||1979-06-04||1985-01-22||Canon Kabushiki Kaisha||Compact printer|
|US4458589A (en) *||1979-10-31||1984-07-10||Canon Kabushiki Kaisha||Compact printer having a typefont belt with a type-free portion|
|JPH025186B2 (en) *||1980-12-29||1990-01-31||Seiko Epson Corp|
|JPH0365273B2 (en) *||1983-05-25||1991-10-11|
|JPH0235486Y2 (en) *||1984-01-31||1990-09-26|
|JPS60176785A (en) *||1984-02-24||1985-09-10||Citizen Watch Co Ltd||Driving mechanism for type drum in printer|
|US4723855A (en) *||1985-01-17||1988-02-09||Seiko Epson Corp.||Compact printer|
|US4706562A (en) *||1985-01-17||1987-11-17||Alps Electric Co., Ltd.||Printing mechanism having one electromagnetic selector for two type rings|
|GB2191151B (en) *||1986-06-03||1990-09-19||Seiko Epson Corp||Printing mechanism for use in a printer|
|US10726602B2 (en) *||2017-02-03||2020-07-28||Sony Corporation||Apparatus and method to generate realistic three-dimensional (3D) model animation|
|CN111055594B (en) *||2019-12-04||2020-09-04||南京溧水高新创业投资管理有限公司||Novel typewriter|
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|Publication number||Priority date||Publication date||Assignee||Title|
|GB1122387A (en) *||1964-12-23||1968-08-07||Int Computers & Tabulators Ltd||Improvements in or relating to cyclically operable printing apparatus|
|US3406381A (en) *||1966-05-09||1968-10-15||Rca Corp||Print hammer energizing arrangement|
|US3322064A (en) *||1966-06-02||1967-05-30||Anelex Corp||Print drum type matrix and sequential line printing control|
|GB1160251A (en) *||1966-07-30||1969-08-06||Internat Computers Ltd Formerl||Improvements in or relating to Selective Printing Apparatus|
|US3514536A (en) *||1966-10-26||1970-05-26||Scm Corp||Recording method and device|
|US3461796A (en) *||1967-11-20||1969-08-19||Honeywell Inc||High-speed printer with shared control circuit|
|US3623428A (en) *||1968-04-30||1971-11-30||Suwa Seikosha Kk||Flying printer|
|JPS4939294B1 (en) *||1968-05-13||1974-10-24|
|US3555518A (en) *||1969-01-28||1971-01-12||Rca Corp||Recording transducer selection limiter|
|GB1248683A (en) *||1969-01-31||1971-10-06||English Numbering Machines||Improvements in or relating to printing mechanisms|
|US3728688A (en) *||1971-05-24||1973-04-17||Honeywell Inf Systems||Line printer time shared electronics|
- 1972-05-04 JP JP4437872A patent/JPS5245249B2/ja not_active Expired
- 1973-05-02 US US35647273 patent/US3848527A/en not_active Expired - Lifetime
- 1973-05-03 GB GB2097773A patent/GB1436901A/en not_active Expired
- 1973-05-03 NO NO182273A patent/NO136826C/en unknown
- 1973-05-03 DE DE19732322285 patent/DE2322285C3/de not_active Expired
- 1973-05-03 CA CA170,375A patent/CA1004910A/en not_active Expired
- 1973-05-03 DK DK242573A patent/DK145371C/en not_active IP Right Cessation
- 1973-05-03 GB GB165176A patent/GB1436902A/en not_active Expired
- 1973-05-03 SE SE7306219A patent/SE390513B/en unknown
- 1973-05-03 NL NL7306162A patent/NL165114C/en not_active IP Right Cessation
- 1973-05-03 IT IT2367673A patent/IT987114B/en active
- 1973-05-04 CH CH636173A patent/CH570269A5/xx not_active IP Right Cessation
- 1973-05-04 FR FR7316203A patent/FR2183281B1/fr not_active Expired
- 1976-02-18 SE SE7601881A patent/SE402425B/en not_active IP Right Cessation
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|GB1436902A (en)||Printing apparatus|