US3528368A - Device for initiation of the printing action on a high-speed printer - Google Patents

Device for initiation of the printing action on a high-speed printer Download PDF

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Publication number
US3528368A
US3528368A US698481A US3528368DA US3528368A US 3528368 A US3528368 A US 3528368A US 698481 A US698481 A US 698481A US 3528368D A US3528368D A US 3528368DA US 3528368 A US3528368 A US 3528368A
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US
United States
Prior art keywords
cam
drum
striker
type
type drum
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.)
Expired - Lifetime
Application number
US698481A
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English (en)
Inventor
Max Oberholzer
Robert Locher Schonbuhl
Heinz Brechbuhl
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.)
Hasler AG
Original Assignee
Hasler AG
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
Application filed by Hasler AG filed Critical Hasler AG
Application granted granted Critical
Publication of US3528368A publication Critical patent/US3528368A/en
Anticipated expiration legal-status Critical
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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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/14—Means for selecting or suppressing individual hammers
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/28—Cams

Definitions

  • a high-speed printer including a rotating type drum, a plurality of strikers arranged to press, when actuated, a recording medium against a character on the periphery of the type drum, and actuating means for actuating selected strikers and including a cam drum having cams selectively movable between an active and an inactive position to actuate in the active position a selected striker.
  • the present invention relates to an improved device for initiation of the printing action on a high-speed printer.
  • Electromagnetic driving systems are employed for accelerating the strikers in numerous known high-speed printers.
  • the efficiency of these devices is low, since it is difficult to generate the speed and momentum required for the strikers by means of electromagnets. Maintenance of the precise printing instant is also extremely difficult in such driving systems.
  • a triggering device in which a so-called impact wheel running synchronously with the type drum is employed as a mechanical energy storage device for accelerating the strikers.
  • a coupling element is inserted from the outside at the desired instant, under control of a magnetic system, into the impact wheel, which causes the initiation of the printing action, inasmuch as a tooth of the impact wheel or gear is coupled with the striker and the impact wheel imparts the required energy to the striker.
  • the coupling element is situated outside the energy storage device, i.e. is structurally separate from the same.
  • the coupling element is transferred into the energy store, thereby obtaining a simple structure reliable in operation.
  • This device is characterized in that parallel to the type drum a continuously revolving cam drum is provided, in which several cams are housed for each printing point, which may optionally be brought into the operating position by means of a magnetic system situated on the periphery of the cam drum, in which position they operate the strikers and thus initiate the printing action.
  • FIG. 1 is a schematic perspective view of the device according to the present invention.
  • FIGS. 2-4 are side views showing various elements of the device in successive positions.
  • the continuously revolving type drum built up from separate type discs is marked I.
  • characters 2 for printing and an unoccupied space running past the striker during the period of paper feed are provided on the periphery of each type disc.
  • Axially parallel to the type drum 1 is situated the equally continuously revolving cam drum 3, which is built up from separate cam discs 4.
  • the cams for two consecutive impression points positioned adjacently in the impression line are slidably arranged in radially extending grooves 14 formed in opposite end faces of the cam discs 4.
  • nine cams 5 are incorporated per impression point or for each disc of the type drum, of which only four are shown completely in the drawing for the first impression point.
  • An electrically controllable coil 6 of an electro-magnet is incorporated on the outer periphery of the cam'drum 3 for each impression point.
  • the coils 6 are positioned staggered relative to each other on the periphery of the cam drum.
  • the cams 5 may selectively be moved radially outwardly to their operating position.
  • each coil 6, in direction of rotation of the drum 3, is situated a return or restoring (50g 7 having a cam surface 7a, by means of which the cam 5 drawn out by the coil 6 is pushed back into the initial position.
  • the corresponding coil 6 is ac-- .tivated by means of an electronic selection system, to initiate the printing action at an impression point. If the cadencer signal corresponds to the input signal of the required character, the coil 6 is energized during the time in which the brush 8 of the cadencer rotating with the type drum 1 brushes over a contact track 9a of the contacter disc 9, and the cam 5 situated under the pole piece 6a at this instant is moved radially outwardly into the operating position.
  • the radially outwardly moved cam 5 strikes the corresponding striker segment 10 of a set of striker elements tumably mounted on a pin -15 and whose lower extremities are situated barely above the cam drum 3.
  • the upper extremity of the struck striker segment is thereby flung against the type drum 1 respectively against the recording paper 13 situated between the striker segment and the type drum.
  • the striker segment 10 After impact on the type drum 1, the striker segment 10 rebounds, and is held in the initial position by a spring 16 fastened at opposite ends to a fixed pin 17 and to the striker segment against a damping element 18.
  • cam 5 Before the radially outwardly moved cam 5 reaches its coil 6 again during further rotation of the cam drum 3, it is engaged by the restoring cam surface 7 and pushed back into the initial position.
  • the cam 5 is held in its initial position by means of a spring-loaded detent pin or the like 11, which engages in a groove 5a formed in the cam 5.
  • the coils 6 and the restoring cam surfaces 7 are not positioned in a row but staggered relative to each other on the periphery of the cam drum 3, and a compact form of construction being obtained thereby for this initiating device.
  • the coils and restoring cam surface are arranged in four groups, each group on a bridge element 12, for example one group for the first, fifth, ninth, 13th, 17th and 21st impression points. 0f the four bridge elements 12 incorporated in the example of embodiment, only two are illustrated in the drawing.
  • the staggered arrangement of the coils 6 on the periphery of the cam drum 3 has the result that the so-called access period for a specific numeral 2, Le. the time required on selection of the character for rotary displacement of the type drum to bring the character which is to be printed to the impression point, is not of the same magnitude at all impression points.
  • the type discs are also arranged in groups and positioned peripherally staggered on the spindle of the type drum.
  • the coils 6 are distributed on the periphery of the cam drum 3, in such manner that the same may simultaneously actuate a second striker system 110 respectively a second printing mechanism.
  • the striker segments 110 of the second striker system are turnably mounted on a pin 115 and held in their initial positions by springs 116 carried at one end by pin 117 against damping element 118.
  • the type discs incorporated in the type drum 101 in this printing mechanism are correspondingly installed in staggered arrangement.
  • a type drum rotatable about its axis, said type drum having on its periphery at least one set of characters arranged circumferentially spaced from each other substantially in a plane normal to the axis of the drum; a cam drum rotatable in a predetermined direction about an axis substantially parallel to that of said type drum and in correlation to the rotation of the latter and including at least one set of cams circumferentially spaced from each other and each movable between an active position and an inactive position; at least one striker; means mounting said striker movable in said plane toward and away from the periphery of said type drum with a portion of said striker located in the path of a cam located in said active position so as to be engaged by the latter during rotation of said cam drum and to be moved toward the periphery of said type drum so as to move a recording medium located between said striker and the periphery of said type drum into engagement with a character; moving means cooperating with said cams to
  • said striker comprises a segment pivotally mounted on said mounting means about an axis substantially parallel to that of said type drum.
  • a type drum rotatable about its axis and having on its periphery a plurality of sets of type characters, the type characters in each set being arranged circumferentially spaced from each other substantially in a plane normal to the axis of said drum, and the plurality of sets being arranged in a plurality of axially displaced planes; a cam drum rotatable in a predetermined direction about an axis substantially parallel to that of said type drum and in correlation to the rotation of the latter and including a plurality of sets of cams.
  • each set being circumferentially spaced from each other and said set of cams being arranged in said cam drum axially displaced from each other, each cam being movable in radial direction between an active position and an inactive position; a plurality of strikers; means mounting said strikers respectively movable in said planes toward and away from the periphery of said type drum with a portion of each striker located in the path of a respective cam when the latter is in said active position so as to be engaged by the respective cam during rotation of said cam drum and to be moved toward the periphery of said type drum so as to move a recording medium located between the engaged striker and the periphery of said type drum into engagement with a character; moving means cooperating with said cams to move a selected cam of said sets of cams from its inactive to its active position; and restoring means located in direction of rotation of said cam drum ahead of said moving means for moving any cam which is in said active position back to its inactive position, said moving means and said restoring means for said sets
  • cam drum comprises a plurality of coaxial discs abutting against each other with opposite end faces thereof, each of said discs being formed in each of said end faces thereof with a plurality of radially extending grooves for guiding adjacent sets of cams movable between said active and said inactive position.

Landscapes

  • Rotary Presses (AREA)
  • Impact Printers (AREA)
  • Common Mechanisms (AREA)
US698481A 1967-01-19 1968-01-17 Device for initiation of the printing action on a high-speed printer Expired - Lifetime US3528368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH75067A CH468678A (de) 1967-01-19 1967-01-19 Vorrichtung zum Auslösen des Druckvorganges bei einem Schnelldrucker

Publications (1)

Publication Number Publication Date
US3528368A true US3528368A (en) 1970-09-15

Family

ID=4194320

Family Applications (1)

Application Number Title Priority Date Filing Date
US698481A Expired - Lifetime US3528368A (en) 1967-01-19 1968-01-17 Device for initiation of the printing action on a high-speed printer

Country Status (7)

Country Link
US (1) US3528368A (de)
CH (1) CH468678A (de)
DE (1) DE1574703A1 (de)
FR (1) FR1552424A (de)
GB (1) GB1161389A (de)
NO (1) NO120909B (de)
SE (1) SE343965B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731622A (en) * 1970-03-18 1973-05-08 California Electro Scient Intermittent type drum advancing means in a high speed printer
US3742844A (en) * 1968-12-09 1973-07-03 Dennison Mfg Co Print wheel control system
US3890894A (en) * 1972-05-04 1975-06-24 Citizen Watch Co Ltd Electromagnetically-operated printer
US4089401A (en) * 1976-10-12 1978-05-16 Scott Thaddeus Leroy Segmented printout device
US4244288A (en) * 1977-03-26 1981-01-13 Kyodo Insatsu Kabushiki Kaisha Flying printer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742844A (en) * 1968-12-09 1973-07-03 Dennison Mfg Co Print wheel control system
US3731622A (en) * 1970-03-18 1973-05-08 California Electro Scient Intermittent type drum advancing means in a high speed printer
US3890894A (en) * 1972-05-04 1975-06-24 Citizen Watch Co Ltd Electromagnetically-operated printer
US4089401A (en) * 1976-10-12 1978-05-16 Scott Thaddeus Leroy Segmented printout device
US4244288A (en) * 1977-03-26 1981-01-13 Kyodo Insatsu Kabushiki Kaisha Flying printer

Also Published As

Publication number Publication date
SE343965B (de) 1972-03-20
DE1574703A1 (de) 1971-05-27
GB1161389A (en) 1969-08-13
NO120909B (de) 1970-12-21
CH468678A (de) 1969-02-15
FR1552424A (de) 1969-01-03

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