US3847261A - Platen mechanism in which angular position of each of a plurality of platen members disposed coaxially may be adjusted independently of others - Google Patents

Platen mechanism in which angular position of each of a plurality of platen members disposed coaxially may be adjusted independently of others Download PDF

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Publication number
US3847261A
US3847261A US00306877A US30687772A US3847261A US 3847261 A US3847261 A US 3847261A US 00306877 A US00306877 A US 00306877A US 30687772 A US30687772 A US 30687772A US 3847261 A US3847261 A US 3847261A
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US
United States
Prior art keywords
platen
clutch
members
plunger
hollow shaft
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
US00306877A
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English (en)
Inventor
K Matsuhisa
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.)
Ricoh Co Ltd
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Ricoh Co Ltd
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Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of US3847261A publication Critical patent/US3847261A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts
    • B41J11/50—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts in which two or more papers or sets are separately fed in the same direction towards the printing position
    • B41J11/51—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts in which two or more papers or sets are separately fed in the same direction towards the printing position with different feed rates
    • 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
    • B41J11/24—Detents, brakes, or couplings for feed rollers or platens

Definitions

  • the present invention relates to a platen mechanism for a typewriter of the type in which the angular position of each of a plurality of platen members disposed coaxially may be selectively adjusted independently of the other platen members.
  • a platen of a typewriter preferably comprises a plurality of divided platen members which are coaxially disposed and are individually rotatable independently of the other platen members.
  • a platen of the type comprising two platen members which may be engaged with or disengaged from each other by a pin extending through holes formed through the two platen members and off the axis thereof. When the two platen members are disengaged from each other, the angular position of each of them may be arbitarily selected.
  • this platen mechanism has a disadvantage that the two platen members may be engaged with each other only when the holes of the two platen members are aligned with each other. Therefore the platen mechanism of the type described cannot be applied to a platen comprising a plurality of platen members.
  • One of the objects of the present invention is therefore to provide a multi-platen mechanism of the type in which a plurality of divided platen members may be rotated in unison and are disengaged from each other so that the angular position of each of the plurality of platen members may be selectively adjusted independently of the other platen members.
  • a plurality of divided platen members are engaged with and disengaged from each other through clutches.
  • a ratchet wheel which is driven by a suitable driving mechanism is engaged with and disengaged from the platen mechanism through a spring loaded clutch.
  • the plurality of platen members are fitted over a hollow shaft into which is in turn fitted a plunger.
  • a collar which is slidably fitted over the hollow shaft has a pin which is fitted into an axially elongated slot formed in the hollow shaft and is fixed to the plunger.
  • Each end of the collar is coupled to a respective clutch through a thrust bearing so that when the plunger is shifted to the right or left the collar is caused to move to the right or left, thereby engaging or disengaging the respective clutch. Therefore the platen members may be selectively engaged with or disengaged from each other.
  • FIGURE is a side view, partly in section, of a multi-platen mechanism in accordance with the present invention.
  • a platen in accordance with the present invention is shown as comprising three platen members 100, 200 and 300.
  • Spring loaded clutches 10 and 15 are disposed within the platen member at both ends.
  • the clutch 10 comprises a stationary cylindrical member 1 1 securely fixed to the first platen member 100 with a screw 14 and an axially movable disk-shaped member 12 disposed within the stationary member 11.
  • the tapered side 12' of the movable member 12 is normally pressed against the mating tapered portion 11' under the force of a spring 13.
  • the clutch 15 is similar in construction to the clutch 10 except that an axially movable diskshaped member 17 is provided with a stud 20. That is,
  • the clutch 15 comprises a stationary cylindrical member 16 fixed to the platen member 100 with a screw 19 and the movable member 17 whose tapered portion 17' is normally pressed against the mating tapered portion 16' of the stationary member 16 under the force of a spring 18.
  • Two thrust bearings 22 and 27 are disposed within the platen member 200 at both ends thereof.
  • the thrust bearing 22 is positioned within a sleeve 23 fitted into and securely fixed to the second platen member 200 with a screw 24.
  • At the bottom of the sleeve 23 is formed a through hole 23 into which is fitted the stud 20 extending from the movable member 17 in opposed relation with one surface of the thrust bearing 22.
  • a retaining ring 25 is fitted into the sleeve 23 in order to limit the movement of the thrust bearing 22.
  • the thrust bearing 27 is disposed in a manner substantially similar to that of the thrust bearing 22. That is, the thrust bearing 27 is located in a sleeve 28 fitted into and securely fixed to the second platen member 200 with a screw 29,
  • a retaining ring 30 is fitted into the sleeve 28 so that the movement of the thrust bearing 27 may be limited within the sleeve 28.
  • a clutch 31 which is substantially similar in construction to the clutches 10 and 15 disposed in the first platen member 100.
  • a stud 36 extending from an axially movable disk-shaped member 33 of the clutch 31 is extended through a through hole 28' formed in the bottom of the sleeve 28 of the thrust bearing 27 in opposed relation therewith.
  • the movable member 33 is normally pressed against a stationary member 32 fixed to the third platen 300 with a screw 35 under the force of a spring 34.
  • a hollow shaft 37 into which is in turn fitted a plunger 38 for slidable movement in the axial direction.
  • a pin 39 which is fixed to a collar 40 fitted over the hollow shaft 37 and which extends through the left end of the plunger 38 is fitted into an axially elongated slot 37' formed in the hollow shaft 37.
  • the collar 40 is interposed between the pair of thrust bearings 22 and 27 in the second platen member 200.
  • a sleeve 41 having a flange 41 is fitted over the right end portion of the hollow shaft 37 and into the center hole of the clutch 10.
  • the flange 41' is securely fixed to the stationary member 11 of the clutch It) with a screw 42.
  • the sleeve 41 carries a ratchet wheel 43 whichin turn is drivingly coupled to a suitable driving member not shown.
  • a stud 44 extending inwardly from the ratchet wheel 43 is fitted into a through hole 44' formed in the movable member 12 of the clutch 110.
  • the ratchet wheel 43 is engaged with and disengaged from the platen through an operating lever 45.
  • a ball 46 which is fitted into a hole 46' of the hollow shaft 37 and is biased to move radially under the force of a rubber tube 47 fitted over the hollow shaft 37, is fitted into one of the three annular grooves 38', 38" or 38".
  • a sleeve 50 is interposed between the ratchet wheel 43 and a knob 48 fitted over and fixed to the hollow shaft 37 with a screw 49.
  • a knob 51 is fixed to the right end of the plunger 38.
  • the platen members 100, 200 and 300 are engaged with one another.
  • the operating lever 45 is shifted in the direction indicated by the arrow, the movable member 12 is disengaged from the stationary member of the clutch so that the ratchet wheel 43 is disengaged from the platen mechanism.
  • the knob 48 is rotated, the platen members 100, 200 and 300 are rotated in unison so that their angular positions may be arbitarily selected.
  • the plunger 38 When the knob 51 is pulled to the right, the plunger 38 is shifted to the right so that the ball 46 now engages with the first annular groove 38' and the collar 40 slides over the hollow shaft 37 to the right to push the thrust bearing 22 so that the movable member 17 of the clutch is caused to move toward the right against the spring 18 and is disengaged from the stationary member 16.
  • the first platen member 100 is disengaged from the second platen member 200 whereas the second platen member 200 remains in engagement with the third platen member 300. Therefore the angular position of the first platen member 100 may be now freely selected independently of the second and third platen members 200 and 300.
  • the plunger 38 is returned to its normal position by the knob 51, that is the position in which the ball 46 is engaged with the central annular groove 38" as shown in the FIGURE so that the platen members 11%, 200 and 30th are engaged with one another. Therefore when the lever 45 is operated so as to cause the movable member 12 to engage with the stationary member 111 of the clutch 10 in the first platen member 1%, the rotation of the ratchet wheel 43 is now transmitted to the first, second and third platen members 100, 200 and 300 through the clutches 10, 15 and 31.
  • the platen mechanism may be arranged and constructed on the left side in a manner substantially similar to that described hereinbefore.
  • a platen mechanism in which the angular position of each of a plurality of platen members coaxially disposed may be adjusted independently of the other of said platen members, said platen mechanism comprismg a. a plurality of platen members disposed coaxially,
  • each of said clutches comprising i. a stationary member disposed at one end of one of said plurality of platen members and ii. a movable member disposed at one end of the platen member adjacent to said one platen member in opposed relation with said one end of said one platen member for slidable movement, said movable member being normally spring-biased into engagement with said stationary member but movable away from said stationary member against said spring bias thereby disengaging said clutch,
  • slidable means connecting to said plunger and slidable over said hollow shaft in response to the shift of said plunger, for causing said clutches to engage or disengage
  • said slidable means including a pin for connecting said slidable means to said plunger, and said hollow shaft having an axially elongated slot through which said pin extends.
  • a platen mechanism as defined in claim I further including a plurality of thrust bearings fitted over said hollow shaft for respectively operatively coupling said slidable means to the movable members of said clutches.
  • Platen mechanism comprising a. a plurality of coaxial, independently rotatable platen members including first and second platen members and a third platen member interposed between said first and second platen members;
  • each of said clutch means comprising i. an annular clutch seat mounted fixedly and coaxially within one of two adjacent platen members,
  • a plunger extending through said platen members and clutch means along the common axis thereof and longitudinally movable relative thereto;
  • clutch-member-displacing means operatively connected to said plunger, and movable therewith along said common axis, for engaging and displacing the clutch member of each said clutch means out of engagement with the clutch seat of the respective clutch means upon movement of said plunger in a given direction along said common axis
  • said clutch-member-displacing means comprising a sleeve concentrically surrounding said shaft within said third platen member and axially slidable relative to said shaft between an inoperative central position and opposed first and second positions for respectively displacing the clutch members of the clutch means respectively mounted in said first and second platen members out of engagement with the respective clutch seats of said clutch means, and means connecting said sleeve and plunger through said slot.

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US00306877A 1971-11-17 1972-11-15 Platen mechanism in which angular position of each of a plurality of platen members disposed coaxially may be adjusted independently of others Expired - Lifetime US3847261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46092214A JPS5129452B2 (enrdf_load_stackoverflow) 1971-11-17 1971-11-17

Publications (1)

Publication Number Publication Date
US3847261A true US3847261A (en) 1974-11-12

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ID=14048176

Family Applications (1)

Application Number Title Priority Date Filing Date
US00306877A Expired - Lifetime US3847261A (en) 1971-11-17 1972-11-15 Platen mechanism in which angular position of each of a plurality of platen members disposed coaxially may be adjusted independently of others

Country Status (4)

Country Link
US (1) US3847261A (enrdf_load_stackoverflow)
JP (1) JPS5129452B2 (enrdf_load_stackoverflow)
DE (1) DE2256509C3 (enrdf_load_stackoverflow)
IT (1) IT970976B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105106A (en) * 1974-06-15 1978-08-08 Adlerwerke Vorm. Heinrich Kleyer A.G. Typewriter platen clutch mechanism
US4335971A (en) * 1980-03-07 1982-06-22 The Perkin-Elmer Corporation Recorder paper drive
US4984914A (en) * 1988-03-28 1991-01-15 Tpshio Hayakawa Multi-task printer
EP0535840A1 (en) * 1991-09-20 1993-04-07 Brother Kogyo Kabushiki Kaisha Platen roller
US20080174652A1 (en) * 2007-01-19 2008-07-24 Geoffrey Schmid Print media support system and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703345C3 (de) * 1977-01-25 1981-06-04 Mannesmann AG, 4000 Düsseldorf Friktionsantrieb für mindestens zwei Friktionswalzen

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1099134A (en) * 1912-05-21 1914-06-02 Underwood Typewriter Co Type-writing machine.
US1158408A (en) * 1915-07-31 1915-10-26 Underwood Typewriter Co Type-writing machine.
US1196110A (en) * 1916-08-29 Line-spacing mechanism por type-writing machines
US1283367A (en) * 1916-04-22 1918-10-29 Corona Typewriter Co Inc Type-writing machine.
US1531875A (en) * 1922-08-02 1925-03-31 Underwood Typewriter Co Typewriting machine
US1880220A (en) * 1928-12-17 1932-10-04 Sundstrand Corp Paper carriage
US1931382A (en) * 1928-11-17 1933-10-17 Remington Typewriter Co Typewriting machine
US2120360A (en) * 1935-12-05 1938-06-14 Ibm Typewriting machine
US2213552A (en) * 1938-07-11 1940-09-03 Ibm Paper feeding device
US2805748A (en) * 1957-09-10 James h
US3208575A (en) * 1964-08-26 1965-09-28 Ibm Paper feed mechanism for typewriter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2047233A (en) * 1932-07-29 1936-07-14 John Q Sherman Multisectional platen

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1196110A (en) * 1916-08-29 Line-spacing mechanism por type-writing machines
US2805748A (en) * 1957-09-10 James h
US1099134A (en) * 1912-05-21 1914-06-02 Underwood Typewriter Co Type-writing machine.
US1158408A (en) * 1915-07-31 1915-10-26 Underwood Typewriter Co Type-writing machine.
US1283367A (en) * 1916-04-22 1918-10-29 Corona Typewriter Co Inc Type-writing machine.
US1531875A (en) * 1922-08-02 1925-03-31 Underwood Typewriter Co Typewriting machine
US1931382A (en) * 1928-11-17 1933-10-17 Remington Typewriter Co Typewriting machine
US1880220A (en) * 1928-12-17 1932-10-04 Sundstrand Corp Paper carriage
US2120360A (en) * 1935-12-05 1938-06-14 Ibm Typewriting machine
US2213552A (en) * 1938-07-11 1940-09-03 Ibm Paper feeding device
US3208575A (en) * 1964-08-26 1965-09-28 Ibm Paper feed mechanism for typewriter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105106A (en) * 1974-06-15 1978-08-08 Adlerwerke Vorm. Heinrich Kleyer A.G. Typewriter platen clutch mechanism
US4335971A (en) * 1980-03-07 1982-06-22 The Perkin-Elmer Corporation Recorder paper drive
US4984914A (en) * 1988-03-28 1991-01-15 Tpshio Hayakawa Multi-task printer
EP0535840A1 (en) * 1991-09-20 1993-04-07 Brother Kogyo Kabushiki Kaisha Platen roller
US20080174652A1 (en) * 2007-01-19 2008-07-24 Geoffrey Schmid Print media support system and method
US7926935B2 (en) 2007-01-19 2011-04-19 Hewlett-Packard Development Company, L.P. Print media support system and method

Also Published As

Publication number Publication date
DE2256509B2 (de) 1979-12-20
DE2256509A1 (de) 1973-05-30
JPS5129452B2 (enrdf_load_stackoverflow) 1976-08-25
IT970976B (it) 1974-04-20
DE2256509C3 (de) 1980-08-28
JPS4857711A (enrdf_load_stackoverflow) 1973-08-14

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