EP0009086A1 - Halbautomatische Papiereinzugsvorrichtung an einer elektronischen Schreibmaschine - Google Patents

Halbautomatische Papiereinzugsvorrichtung an einer elektronischen Schreibmaschine Download PDF

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Publication number
EP0009086A1
EP0009086A1 EP79102457A EP79102457A EP0009086A1 EP 0009086 A1 EP0009086 A1 EP 0009086A1 EP 79102457 A EP79102457 A EP 79102457A EP 79102457 A EP79102457 A EP 79102457A EP 0009086 A1 EP0009086 A1 EP 0009086A1
Authority
EP
European Patent Office
Prior art keywords
paper
signal
cam
line spacing
path
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.)
Granted
Application number
EP79102457A
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English (en)
French (fr)
Other versions
EP0009086B1 (de
Inventor
James Cloyd Buchanan
John Joseph Bisczat
Charles Dale Bleau
Robert Randall Lisk
William Roy Mac Cray
James Louis Sizemore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lexmark International Inc
Original Assignee
International Business Machines Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/945,921 external-priority patent/US4266880A/en
Priority claimed from US05/945,922 external-priority patent/US4273456A/en
Priority claimed from US05/945,953 external-priority patent/US4272205A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to AT79102457T priority Critical patent/ATE507T1/de
Publication of EP0009086A1 publication Critical patent/EP0009086A1/de
Application granted granted Critical
Publication of EP0009086B1 publication Critical patent/EP0009086B1/de
Expired legal-status Critical Current

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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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B41J13/03—Rollers driven, e.g. feed rollers separate from platen

Definitions

  • the present invention relates generally to the introduction of paper into an electronic typewriter and, more particularly, a device allowing the semi-automatic advancement of a sheet of paper to the desired position for printing the first line of text.
  • the increase in the cost and complexity of these machines is mainly due to the fact that the operator must be able to indicate the desired position of the first printing line and that the paper path must be prepared for the introduction of this one, for example by releasing some platinum the paper holding device, so as not to stop the advancement of the front edge of the sheet fed into the machine (or of the set of sheets with intercalated carbon papers).
  • a dial (such as those described in US Pat. Nos. 3,960,258 and No. 3,276,562) or a selector lever (such as that described in US Patent No. 2,463,259) is commonly used to indicate the desired first printing line and these devices are coupled to mechanical stops or to declutching devices intended to limit the advancement of the paper.
  • the sheet of paper should be kept securely in place on the platen in the printing area.
  • the paper holding device which generally consists of a set of rollers mounted on a rod, does not allow, when it is in the operating position, easy passage of the paper opposite the printing area. In fact, a jamming condition generally appears in the case where the holding device is not manually removed from the paper path and this jamming can cause unacceptable wrinkling of the latter.
  • the presence of the paper holding device of an electronic typewriter is detected (that is to say of the rod and of the rollers mounted thereon and applying the paper against the plate in a position adjacent to the printing area) outside the paper path, to trigger a control unit in order to access the representation of a stored coded distance and to control a corresponding advance of the paper.
  • the signal from the keyboard is converted into a coded representation of a corresponding distance which is stored in a particular memory position of the memory circuits of the machine. Therefore, no dial or special selection lever is necessary to establish the distance to travel to the first desired print line.
  • a key such as the classic “CODE” key of electronic waxing machines can preferably be used to condition the control logic of the typewriter for counting advance pulses (for example, the pulses generated in response to the pressing of a "LINE" key) and this account is then used to establish the coded representation of the distance to the first desired print line which is stored in a memory position intended for re receive such information.
  • the machine logic controls an interlinear mechanism which advances the paper by said distance.
  • This interlining mechanism advances the paper in increments by means of a ratchet / ratchet wheel integral with the plate.
  • Two cams with different profiles ensure, via a cam follower, different engagement points of the pawl in the ratchet wheel and, therefore, different advancements of the paper.
  • the position of one of the cams can be adjusted by the operator to modify the length of his profile which is followed by the follower and, consequently, the distance by which the paper is advanced.
  • This cam can be moved away from the follower by means of a mechanism controlled by an electrical signal and the follower then passes under the control of the other cam which ensures paper advance over a greater distance. As soon as the signal ceases, the first cam automatically regains control of the follower.
  • a particular advantage of the present invention results from the fact that the control elements which the operator must actuate for the introduction of the paper, that is to say the device for holding the paper and the "SPLIT" key, are associated naturally to handling paper, which facilitates operator education.
  • a typewriter 10 suitable for use according to the present invention comprises a plate 12 and a paper holding device 13 formed by a rod 14 on which is mounted an assembly of rollers 16, said rod being coupled to a control lever 18.
  • the signals representative of the characters to be printed by the machine as well as the functions to be executed by the latter are generated by means of a keyboard 20 composed of various keys comprising a set of numeric keys 22, a code key 24, an interline key 26, as well as character keys, not referenced.
  • the circulation of these various signals in the constituent elements of the typewriter is generally triggered by the operator who, as this is shown in dashes in FIG. 2, acts on the keyboard 20 to generate coded signals which are delivered to an intermediate keyboard memory 28 of an interface device 30.
  • the manipulation of the paper holding device 13 via the lever 18, as described in detail below, causes the generation of signals by a detector 32, signals which are delivered to the interface 30.
  • the signals are put in intermediate memory to be transmitted by a set of data lines 34 to a processor 36, this transmission taking place in response to addresses transmitted on an address conductor 38 in association with a signal sampling transmitted on a conductor 40, in a manner well known to those skilled in the art.
  • the decoding and the intermediate storage are centralized in the interface 30 as indicated here (such an interface can, for example, be used with a processor whose conductor structure would be similar to that described in the patent of E. ⁇ . A.?
  • the processor 36 is designed to perform various basic logic functions and a permanent memory 42 contains the sequence of basic operations to be performed by the processor, in the form of physical structures in a manner known to man. art. During the execution of such sequences or processes, the storage of accessible coded signals is sometimes required, which can be ensured by a read and write memory 44.
  • the signals are sent from the processor 36 by the data lines 34 to the interface device 30, to control various output devices (again selected by corresponding addresses transmitted on the address conductor 38) for example the device for selecting the characters (not shown) and an interlining device 50 which is mechanically coupled to the plate 12 to drive the latter in rotation. More particularly, addresses are assigned to a control signal "INTERLIGNING” and a control signal “TRIPLE”, which signals are delivered respectively by lines 52 and 54 to the interlining device 50 via the interface 30 (which decodes the addresses to select the corresponding output channel) in order to cause a line spacing operation and switching to triple spacing increments, respectively, as will be described in detail below.
  • FIG. 3 represents a device for holding the paper 13 according to the present invention and which is associated with a detector 32 comprising a magnet 62 and a reed switch 64, fixed to the chassis of the typewriter (not represented).
  • the magnet 62 is fixed to one of the arms of a bracket 66 which pivots about an axis 68 and comprises a tab 70 intended to come into contact with a stud 73 which limits the movement of the bracket.
  • the movement is transmitted to the bracket 66 by the contact of the paperweight lever 18 with a tongue 74 carried by the other arm of the bracket.
  • the lever 18 also pivots around the axis 68 and can take three positions, namely, a paper holding position shown in phantom, a withdrawal position stable shown in solid lines and an unstable extreme withdrawal position shown in dashes.
  • this position of extreme withdrawal which will be called hereinafter "detection position”
  • the bracket 66 is rotated, against the force exerted by a return spring 76, in order to cause the closure of the reed switch 64 via magnet 62 and it is the force applied by this spring which causes the instability of this position.
  • the lever 18 In the stable withdrawal position, the lever 18 is held in place by a conventional articulated spring 78 mounted between a tongue 80 secured to the lever 18 and a fixed stud 82.
  • the lever 18 In the paper holding position, the lever 18 is biased by the spring 78 to apply the rollers 16 mounted on the roller support rod 14 (see Figure 1) against the plate 12 which, in association with all of the rollers 72, defines the paper feed path.
  • FIGS. 4 and 5 represent the interlinear mechanism 50 according to the invention.
  • This mechanism comprises a first cam element 102 having a guide profile 103 used during normal line spacing operations and a second cam element 104 having a guide profile 105 ensuring the advancement of the paper at high speed when it is introduced into the machine.
  • a finger 110 is used as a cam follower and is fixed to a pawl 112 to determine the point where this pawl 112 will act on a ratchet wheel 114 connected to the plate 12 (the longer the action, the greater the increment of advancement).
  • the pawl drive movement 112 is transmitted from a drive shaft (not shown), via the middle of a cycle clutch 116, to an interlocking clutch 118, then by a connecting rod 120 to a pawl holder 122 pivoting about an axis 123 and returned by a spring 121 to pull on the connecting rod 120.
  • the pawl holder 122 is connected to the pawl 112 by a stud 124 and a spring 126, mounted between studs 128 and 129, respectively integral with the pawl holder and the pawl, recalls the pawl towards the profiles 103 and 105 of the elements cam 102 and 104 respectively.
  • the pawl 112 is animated with each motor cycle of a movement (the advanced position of the pawl is shown in dashes in Figure 5) and the length over which the profile 103 is traversed by the finger 110 can be adjusted manually by the operator by means of a selector lever 130 which pivots about a fixed axis 131.
  • the cam element 102 is connected to the selector lever 130 by an axis 132 and the movement of the cam element 102 is limited by a finger 134 which passes through a buttonhole 138 of the cam element.
  • FIG. 6 different positions of the interlinear selection lever 130 and of the cam element 102 have been shown. Special interlinear positions can be determined by a notched bar 140 (see FIG.
  • an electro- magnet 150 comprising a movable armature 152 having a bent arm 154 which, in the active position, comes into contact with the cam element 102 and shifts it laterally (to the left in Figures 4 and 7).
  • the electromagnet 150 is excited by a signal called TRPL and, in the absence of a high signal level causing the shift of the arm 154, a spring 170, mounted on the finger 134, applies a force which maintains the cam element 102 in normal position for monitoring the follower 110.
  • the follower 110 passes under control of the guide profile 105 which is less prominent than the guide profile 103 (see Figure 7) which allows the pawl 112 to be in contact with the ratchet wheel 114 over a relatively long part of its travel and ensures the execution of a triple line spacing.
  • the point of engagement of the pawl during this operation with triple line spacing increments is naturally the same as that obtained with the guide profile 103 in the case where the operator selects a triple line spacing increment using the lever. 130.
  • FIG. 8 represents, for an embodiment of the invention, the circulation of the signals for the entry of a coded signal representing the distance to be traveled to the first desired printing line.
  • the entry of such a coded signal is initiated when the operator presses the code key 24 (or of this code key in combination with another "X" key) which generates a signal called CODX which triggers the execution of a process by the logic of the processor for the counting of the pulses called INT generated during the pressing by the operator of the line key 26 until the next pressing of the key code 24, moment at which the total count is stored in a register 44 'of memory 44.
  • the sequence of logical operations executed by the processor 36 to ensure this storage is defined by the instructions provided by the permanent memory 42 and will be described below with reference to FIG. 9 in the form of a flowchart which can be directly converted into a structure of permanent memory to cooperate with a chosen type of processor 36.
  • step 300 the logic sequence of operations starts at step 300, at an entry point from a general service loop (not shown) for input signals.
  • the logic of the loop searches for and introduces all possible input signals from the keyboard or any other signal source, according to a defined sequence or with a predefined priority on an interrupt basis.
  • step 302 a test is carried out to determine whether the signal from the detector 32 is at the high level. This signal is designated below by PBS. If the test indicates that the PBS signal is at the high level, that is to say in the logic state "1", the content of the register 44 ′ in the memory 44 is also stored, during a step 304 , in the working register 36 'of processor 36 (see also Figure 8).
  • the signals INT and TRPL respectively applied to the interlining clutch 118 and to the electromagnet 150 of the interlining device 50 are switched to the state logic "1" during a step 306.
  • a cycle control pulse called CC is applied to the cycle clutch 116.
  • step 310 the register 36 'is decremented at each cycle of said clutch, and during step 312 it is determined whether the content of the register 36 'is equal to zero; if this is not the case, a new CC pulse is applied to the clutch 116.
  • step 302 If the test executed during step 302 does not reveal the presence of the PBS signal at the high level, the unfolding of the logic sequence continues by accessing the intermediate keyboard memory 28 during step 320. Then, during step 322, the logic determines whether a CODX code has been received and if this is not the case, other requests from the keyboard and present in the intermediate keyboard memory 28 are satisfied during step 324 and the sequence returns to the general service loop during step 326.
  • step 322 determines that a CODX signal has been received, the content of register 36 'is set to zero,' during step 328, for a counting operation.
  • step 330 the logic determines whether an interline operation has been required by means of the key 26. If this is the case, the output INT of the processor has changed to logic state "'1" during . from step 331. The necessary printing cycles are then triggered by the application of DC pulses to the cycle clutch 116 during step 332. If multiple printing cycles are necessary to perform a line spacing operation, a mark for this purpose may be put in the register to reflect this need.
  • step 334 the logic searches in step 338 for the CODX signal which is preferably used to indicate the end of an entry operation. If the signal CODX is recognized, the total content of the register 36 'is stored during step 340 in position 44' of the memory 44 and then one returns to the general service loop for input signals to the during step 342. If the test carried out during step 338 is negative, a new coded signal is sought in the intermediate keyboard memory by returning to step 334.
  • a preferred signal processing arrangement allowing the operator to enter a coded signal representing the distance to be traveled to the first print line, uses the PBS signal from detector 32 to trigger conditioning of processor 36 for reception of distance information from keyboard 20 (see Figure 1).
  • This distance information preferably presenting in the form of coded signals from the numeric keys of the keyboard, is decoded using a table or a stored conversion process.
  • Corresponding coded signals representing line spacing increments to arrive at the first desired printing line, are generated and stored in register 44 1 of memory 44.
  • the change in the state of the PBS signal when the paper holding device 13 leaves the detection position, as defined above with reference to FIG. 3 causes the processor to access the code stored in the register 44 ′ and the command by said processor of a corresponding number d leading operations.
  • the signal processing sequence which is dictated by the structure of the permanent memory 42 and causes the machine to operate according to the teachings of the present invention under the control of the processor 36, will now be described with reference to FIG. 11.
  • the sequence of logical operations necessary for the introduction of the paper starts at step 400 from the general service loop of input signals performed by the processor 36 and begins with the execution of a test at step 402 to determine the state of the PBS signal from the detector 32. If the device 13 is not in the detection position, that is to say if the PBS signal is equal to "0", the normal processing of the coded signals from the keyboard 20 continues at step 404 in a manner well known in the prior art.
  • step 406 to grab the paper at the slit inserting the paper into the typewriter to free the operator's right hand from holding the paper in place.
  • the signals INT and TRPL are switched to the logic state "1".
  • a waiting period occurs in step 408 until the device 13 is released from its detection position, as indicated by the transition to the logical state "0" of the PBS signal; then access to the intermediate keyboard memory 28 during step 410 in order to determine during step 412 if the operator has carried out any operations on the keyboard while the rod 13 was in the detection position.
  • the last coded character signal entered on the keyboard is accessed and the intermediate memory is emptied during step 414.
  • the coded character signal is then tested during step 416 to determine whether, in particular, a coded digital key signal is recognized or not. If so, this coded digital key signal is then decoded during step 418 using a table 420 stored in memory 42 in order to generate a coded signal representing a preselected number of line spacing operations; for example a coded signal of the digital key "2" preferably corresponds to two triple leading operations.
  • a fixed number of line spacing operations is added to the step 422 to the number stored in the register 44 '.
  • the value stored in register 44 is also stored in the register 36 'during step 424.
  • a repeated loop constituted by steps 426, 428, 430 and 432
  • line spacing operations are performed and the content of register 36 'is decremented during step 430 with each line spacing operation triggered by the signals CC applied during step 428 to the clutch 116.
  • a stop d emergency is provided to improve the operator's control of the typewriter and this emergency stop is triggered during step 426 in the case where, at this step, the logic determines that the device for maintaining the paper 13 is again brought to the detection position, that is to say that the PBS signal is at logic level "1".
  • a process for setting initial operating conditions is included in normal logic operations, when the machine is powered up.
  • This process of setting in initial operating conditions comprises the storage, in the register 44 ′, of a coded signal of the first printing line structured in the permanent memory 42, in the case where the operator does not perform it. - even the introduction of such a coded signal.

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  • Character Spaces And Line Spaces In Printers (AREA)
EP79102457A 1978-09-26 1979-07-16 Halbautomatische Papiereinzugsvorrichtung an einer elektronischen Schreibmaschine Expired EP0009086B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102457T ATE507T1 (de) 1978-09-26 1979-07-16 Halbautomatische papiereinzugsvorrichtung an einer elektronischen schreibmaschine.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US945921 1978-09-26
US05/945,921 US4266880A (en) 1978-09-26 1978-09-26 Paper insertion apparatus
US945922 1978-09-26
US05/945,922 US4273456A (en) 1978-09-26 1978-09-26 Paper insertion apparatus for a typewriter
US945953 1978-09-26
US05/945,953 US4272205A (en) 1978-09-26 1978-09-26 Signal controlled indexing rate shifter for a typewriter

Publications (2)

Publication Number Publication Date
EP0009086A1 true EP0009086A1 (de) 1980-04-02
EP0009086B1 EP0009086B1 (de) 1981-12-30

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EP79102457A Expired EP0009086B1 (de) 1978-09-26 1979-07-16 Halbautomatische Papiereinzugsvorrichtung an einer elektronischen Schreibmaschine

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EP (1) EP0009086B1 (de)
DE (1) DE2961685D1 (de)
IT (1) IT1163714B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063588A1 (de) * 1980-11-04 1982-11-03 Wang Laboratories Durch die obere papierandruckschiene gesteuerte papierzuführ- und -fördereinrichtung.
EP0063590A1 (de) * 1980-11-04 1982-11-03 Wang Laboratories Selektiv arbeitende papierzuführ- und -fördereinrichtung für einzelblattdrucker.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697621C (de) * 1937-07-30 1940-10-23 Schreibmaschinen chinen, namentlich Buchungsmaschinen
US3353649A (en) * 1964-12-28 1967-11-21 Burroughs Corp Accounting machine record handling apparatus
DE2526445A1 (de) * 1975-06-13 1976-12-23 Triumph Werke Nuernberg Ag Papiereinwerfer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697621C (de) * 1937-07-30 1940-10-23 Schreibmaschinen chinen, namentlich Buchungsmaschinen
US3353649A (en) * 1964-12-28 1967-11-21 Burroughs Corp Accounting machine record handling apparatus
DE2526445A1 (de) * 1975-06-13 1976-12-23 Triumph Werke Nuernberg Ag Papiereinwerfer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063588A1 (de) * 1980-11-04 1982-11-03 Wang Laboratories Durch die obere papierandruckschiene gesteuerte papierzuführ- und -fördereinrichtung.
EP0063590A1 (de) * 1980-11-04 1982-11-03 Wang Laboratories Selektiv arbeitende papierzuführ- und -fördereinrichtung für einzelblattdrucker.
EP0063590A4 (de) * 1980-11-04 1984-03-01 Wang Laboratories Selektiv arbeitende papierzuführ- und -fördereinrichtung für einzelblattdrucker.
EP0063588A4 (de) * 1980-11-04 1984-04-04 Wang Laboratories Durch die obere papierandruckschiene gesteuerte papierzuführ- und -fördereinrichtung.

Also Published As

Publication number Publication date
DE2961685D1 (en) 1982-02-18
EP0009086B1 (de) 1981-12-30
IT1163714B (it) 1987-04-08
IT7925851A0 (it) 1979-09-20

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