US3011434A - Reversing mechanism for type impression machines - Google Patents

Reversing mechanism for type impression machines Download PDF

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Publication number
US3011434A
US3011434A US75181A US7518160A US3011434A US 3011434 A US3011434 A US 3011434A US 75181 A US75181 A US 75181A US 7518160 A US7518160 A US 7518160A US 3011434 A US3011434 A US 3011434A
Authority
US
United States
Prior art keywords
ribbon
holder
shaft
worm
reversing mechanism
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
US75181A
Other languages
English (en)
Inventor
Schenk Gustav
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle 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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Priority claimed from FR847106A external-priority patent/FR1278828A/fr
Application granted granted Critical
Publication of US3011434A publication Critical patent/US3011434A/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
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/40—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction
    • B41J33/44—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically
    • B41J33/51—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically and characterised by the use of particular reversing control means
    • B41J33/516—Ribbon-feed devices or mechanisms with arrangements for reversing the feed direction automatically and characterised by the use of particular reversing control means using a reversing-feeler responsive to the tension of the ribbon

Definitions

  • this invention relates to ribbon reversing mechanisms wherein two ribbon spools and the respective worm wheels, which are drivingly connected thereto and each of which forms part of the worm gear assembly associated with the respective spool, are arranged on a holder, while the worms of the two gear assemblies are seated on a common driving shaft capable of pivoting relatively to the holder, and wherein the pivoting of the holder and the driving shaft relatively to each other is effected by the increased ribbon pull arising at the end of the unreeling stage of either of the spools.
  • FIG. 1 is a top view of the driving assembly
  • FIG. 2 is a cross-section along the line II -II in FIG. 1.
  • the worm shaft '5 which is rotatably and axially slidably mounted between the side walls 6 of the machine carries at its ends outside said side walls the Worms 7 and 8.
  • the shaft is driven in a manner not here described in detail by the gear wheel .9
  • the worm wheels 10 and 11 are rotatably mounted on bolts 12 positioned at the outer ends of the ribbon spool holder 13. Said worm wheels are designed to mesh alternately with the worms 7 and 8, whose threads are such that the respective driving directions of the worm wheels are opposed when the worm shaft 5 rotates in one direction. To ensure this alternate meshing, the holder 13 is pivoted at a point 32 irnmovably fixed to the framework. Said holder is also provided with guide slots 28 engaged by bolts 29 fixed to the side walls 6. Said holder is capable of pivoting through a small angle in its plane, thus permitting either of the gearings 7, 10 and 8, 11 to become meshed.
  • the ribbon spools 15 and 16 mounted on the bolts 12 are drivingly connected to the worm wheels 10, 11.
  • the ribbon 14 is guided at a short distance past the printing types 18 by means of pins 17 fixed to extensions of the holder 13.
  • the worm shaft 5 is capable of sliding axially over a short distance.
  • One of its endpositions, the upper one in FIG. 1, is determined by the control part 19 coming up against the upper side wall 6, as drawn in FIG. 1, while the other end-position, the lower one in FIG. 1, is similary determined by the gear wheel 9 coming up against the other, lower side wall 6.
  • the control part 19 presents adouble cone which is engaged by a lever 21 provided with a knife-edge 20.
  • Said lever 21 is pivoted on a bolt 22 fixed to the framework, and its knife-edge is pressed against the double cone of the control part 19 by the compression spring 23.
  • a cam 24 is connected to the control part 19, and a cam FIICCM 25 is connected to the gear wheel 9, both cams having the form of eccentric disks.
  • the holder 13 can be provided with a detention device operating by means of a ball or a detention lever. It is suificient, however, if the disks 31 carried by the guide bolts 29 are designed as spring disks capable of braking the holder 13 at the side walls 6 when said holder pivots.
  • the holder 13 is pivoted anticlockwise, so that the worm wheel 11 meshes with the worm 8 while concurrently the worm wheel gearing 7, 10 becomes disengaged. This marks the compietion of the reversal of the ribbon motion, and the ribbon now runs in the direction of arrow B.
  • a ribbon reversing mechanism for type impression machines a framework, a holder pivotally mounted on said framework, a ribbon with two ends, two spools rotatably mounted on said holder to provide for a reelingup motion of the ribbon on to the one spool and an unreeling motion of the ribbon from the other spool, said ends of the ribbon being connected to the two spools to have one spool stopped by the ribbon at the end of the unreeling of the ribbon from the other spool, two worm wheels carried by said holder, each worm wheel being drivingly connected to one of said spools, a driving shaft supported by said framework for rotation about the axis of said shaft and for axial movement back and forth between two working positions, two worms connected to said driving shaft to drive said worm wheels in opposite directions during the said reeling-up motion and to generate an axial screwing motion of said driving shaft on completion of said unreeling motion, spring-loaded detention means to yieldingly hold the driving shaft in one of said working

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  • Impression-Transfer Materials And Handling Thereof (AREA)
US75181A 1959-12-16 1960-12-12 Reversing mechanism for type impression machines Expired - Lifetime US3011434A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH8186959 1959-12-16
CH3011434X 1959-12-16
FR847106A FR1278828A (fr) 1959-12-16 1960-12-16 Dispositif d'entraînement réversible du ruban encré de dispositifs imprimeurs

Publications (1)

Publication Number Publication Date
US3011434A true US3011434A (en) 1961-12-05

Family

ID=27616972

Family Applications (1)

Application Number Title Priority Date Filing Date
US75181A Expired - Lifetime US3011434A (en) 1959-12-16 1960-12-12 Reversing mechanism for type impression machines

Country Status (3)

Country Link
US (1) US3011434A (sl)
GB (1) GB902324A (sl)
NL (1) NL103206C (sl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882774A (en) * 1972-10-06 1975-05-13 Walther Bueromasch Gmbh Device for reversing the direction of drive of an inked ribbon in a high-speed printer
US3976185A (en) * 1973-11-20 1976-08-24 Hermes Precisa International S.A. Typewriter ribbon conveying mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882774A (en) * 1972-10-06 1975-05-13 Walther Bueromasch Gmbh Device for reversing the direction of drive of an inked ribbon in a high-speed printer
US3976185A (en) * 1973-11-20 1976-08-24 Hermes Precisa International S.A. Typewriter ribbon conveying mechanism

Also Published As

Publication number Publication date
GB902324A (en) 1962-08-01
NL103206C (sl)

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