EP0164488A2 - Cassette pour ruban encreur à jeter - Google Patents

Cassette pour ruban encreur à jeter Download PDF

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Publication number
EP0164488A2
EP0164488A2 EP85100540A EP85100540A EP0164488A2 EP 0164488 A2 EP0164488 A2 EP 0164488A2 EP 85100540 A EP85100540 A EP 85100540A EP 85100540 A EP85100540 A EP 85100540A EP 0164488 A2 EP0164488 A2 EP 0164488A2
Authority
EP
European Patent Office
Prior art keywords
ribbon
ribbon cassette
roller
cassette according
transport roller
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.)
Withdrawn
Application number
EP85100540A
Other languages
German (de)
English (en)
Other versions
EP0164488A3 (fr
Inventor
Michael Hornung
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.)
Regentrop and Bernard KG
Original Assignee
Regentrop and Bernard KG
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 Regentrop and Bernard KG filed Critical Regentrop and Bernard KG
Publication of EP0164488A2 publication Critical patent/EP0164488A2/fr
Publication of EP0164488A3 publication Critical patent/EP0164488A3/fr
Withdrawn legal-status Critical Current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
    • B41J32/00—Ink-ribbon cartridges

Definitions

  • the invention relates to a single strike ribbon cassette for writing or printing machines with a housing in which a take-up spool, a transport roller and a pressure roller for the ink ribbon are rotatably mounted, the take-up spool and the transport roller being driven by a common drive of the machine and via a Slipping clutch are connected to each other, and the ribbon is guided frictionally between the transport roller and the pressure roller.
  • Singles.trike ribbon cartridges of the type mentioned are known. They have a disposable ribbon, e.g. B. a carbon tape, which is located on a supply reel and subtracted from it during operation, past a type window of a writing or printing machine and is rewound on a take-up reel.
  • the ribbon is pulled off and transported by a transport roller against which the ribbon is frictionally pressed on with a pressure roller.
  • the take-up reel and the transport roll are driven by a common drive of the writing or printing machine.
  • the machine has two drive shaft journals or the like, which are coupled to the take-up reel or the transport roller via suitable coupling elements when the cassette is inserted into the machine.
  • the drive shaft sockets are connected to each other via an internal slip clutch.
  • the transport roller and the pressure roller interacting with the transport roller of the known cassette have a smooth surface so that the ink ribbon is not damaged during transport or by one Tear the ribbon and counteract a malfunction of the machine.
  • the smooth surface of the transport roller and pressure roller leads to the disadvantage that there is sometimes slippage between the ink ribbon and the transport roller, which leads to the ink ribbon being transported between two type stops of the writing or printing machine by a distance that is less than the type width of the machine is.
  • a patch tape section is available for the drawing to be written, from which parts of the ink layer (carbon layer) have already been removed by the previously written character, so that the character to be written cannot be printed completely, but will have gaps due to the partially missing ink layer .
  • the internal slip clutch is subject to wear, so that it must be readjusted from time to time. In an effort to maintain the longest possible maintenance cycle for the typing or printing machine achieve, the slip clutch is structurally complex for a long service life and therefore expensive.
  • the invention is therefore based on the object of creating a S inglestrike ribbon cassette of the type mentioned at the outset, in which the ribbon transport devices do not have to be readjusted and ensure slip-free transport of the ribbon.
  • the slip clutch is designed as a belt drive and is part of the ribbon cassette and consists of two pulleys connected by a belt and that the transport roller and the pressure roller in the contact area of the ribbon have intermeshing involute teeth.
  • the combination according to the invention of a belt drive slip clutch formed on the singlestrike ribbon cassette and rollers provided with involute teeth leads to a maintenance-free and secure ribbon transport.
  • the slip clutch can be of a structurally very simple and therefore inexpensive design, since it only has to be designed for the life of the associated ribbon cassette.
  • the slip clutch is therefore a structurally simple belt drive, in which the slip clutch effect is generated due to the slipping of the belt.
  • the signs of wear on the slip clutch due to the relatively short life of the ribbon cassette according to the invention are so small that readjustment or the like is not necessary.
  • involute gears have only been used for textile ribbons, i.e. very robust and insensitive ribbons.
  • the single strike ribbon cassette 1 has a housing 2, which is shown in the open state in FIG. 1 and has a base 3 and a circumferential side wall 4.
  • An unwinding spool 5, a winding spool 6, a deflection roller 7, a transport roller 8 and a pressure roller 9 are rotatably mounted in the housing 2.
  • an ink ribbon 10 located on the unwind spool 5 is drawn off the unwind spool 5, is led out of the ink ribbon cassette 1 out of an opening 11 in the side wall 4, and is guided past a type window of a writing or printing machine (not shown) an opening 12 in the side wall 4 is again introduced into the ink ribbon cassette 1, guided around the deflection roller 7, passed between the transport roller 8 and the pressure roller 9 and rewound onto the take-up reel 6.
  • the ribbon 10 is a disposable ribbon, e.g. B. a carbon ribbon, which is softer and much thinner than multiple ribbons of multistrike ribbon cartridges. For this reason, the ribbon 10 is very sensitive to mechanical stress.
  • a hairpin-shaped spring wire clip 13 is provided, one end of which is arranged between side wall webs 14, its middle part 15 is inserted with play into a circumferential groove of the unwind spool 5 and the other end of which has a bent leg 16, around which the the supply reel 5 coming ribbon 10 is looped around.
  • the ink ribbon 10 has an approximately S-shaped course in the interior of the ink ribbon cassette 1.
  • the ink ribbon 10 runs around the deflection roller 7, as a result of which the one sheet of the S is formed, and then lies against the transport roller 8, forming a loop which forms the other sheet of the S.
  • the pressure roller 9 is located in the region of the detachment point of the ink ribbon 10 from the transport roller 8, from which the ink ribbon 10 is fed to the take-up reel 6.
  • the pressure roller is resiliently biased in the direction of the transport roller 8, so that this is between the transport roller 8 and the pressure roller 9 passed ribbon 10 with both rollers 8, 9 is in frictional contact.
  • the transport roller 8 and pressure roller 9 each have involute teeth 17 and 18, respectively.
  • the E volventen toothings 17, 18 are designed such that they mesh with each other when the transport roller 8 and the pressure roller 9 rotate.
  • the transport roller 8 preferably has a tip circle diameter of approximately 16 mm, the involute toothing 17 having thirty-one teeth.
  • the tip circle diameter of the pressure roller 9 is preferably approximately 7 mm, the involute toothing 18 having thirteen teeth.
  • the involute teeth 17 and 18 preferably have a tooth height of approximately 1 mm.
  • the transport of the ribbon 10 of the singlestrike ribbon cassette 1 according to the invention takes place in that the transport roller 8 is coupled to a drive of the machine when the ribbon cassette 1 is inserted into a writing or printing machine (not shown).
  • the transport roller has recesses, for example, on its end wall penetrating the floor 3, into which a drive shaft connector of the drive of the machine engages (not shown).
  • a feed force for the ribbon transport is transmitted to the ink ribbon 10 which is in frictional engagement therewith.
  • the ink ribbon 10 adapts to the tooth contours, the teeth with their flanks making slight impressions in the ink ribbon 10. This ensures an absolutely slip-free transport of the ink ribbon 10.
  • the involute toothing 17, 18 according to the invention does not damage the sensitive single strike ribbon 10, so that ribbon tears and the like are not to be feared.
  • slip clutch 19 For winding the ink ribbon 10 onto the take-up reel 6 is a strength according to the invention in the F. 2 shown slip clutch 19 is provided.
  • the slip clutch 19 connects the transport roller 8 to the take-up reel 6, consists of two pulleys 20, 21 and a belt 22 and is arranged on the outside of a ceiling wall 23 of the housing 2.
  • the slip clutch 19 is thus outside the housing 2, making it very easily accessible.
  • the pulleys 20, 21 have shaft connectors 24 or 25, which pass through corresponding openings in the top wall 23 and in the press fit in axial recesses 26 or 27 of the take-up reel 6 or transport roller 8 are arranged.
  • the recesses 26 and 27 are preferably square and the shaft ends 24 and 25 are provided at the ends with a square 28 and 29, respectively.
  • This design enables a particularly simple assembly of the slip clutch 19 according to the invention, because the shaft connectors 24 and 25 of the pulleys 20 and 21 only need to be pushed through the openings of the ceiling wall 23 already described and into the recesses 26 and 27 of the take-up reel 6 or transport roller 8 can be inserted. Due to the press fits, the pulleys 20 and 21 are held axially via their shaft connectors 24 and 25.
  • the shaft connectors 24 and 25 can be fastened to the pulleys 21 and 22 by gluing or - in the case of pulleys produced in the plastic injection molding process - by molding in; furthermore, the formation of press fits, square recesses and corresponding squares is also possible here
  • the belt 22 of the slip clutch 19 is preferably designed as a rubber ring 30 with a circular cross section.
  • the rubber ring 30 encompasses - as shown in FIG. 2 - the two spaced-apart pulleys 20 and 21.
  • the pulleys 20 and 21 according to FIG. 3 have V-shaped circumferential grooves 31.
  • Fig. 3 shows the pulley 20 with its shaft connector 24, which is designed as a square 28.
  • a detailed illustration of the pulley 21 according to FIG. 3 is not necessary since the pulley 21 is designed in the same way as the pulley 20.
  • the slip clutch effect of the slip clutch 19 is achieved in that the rubber ring 30 transmits only a torque up to a certain size without slippage from the pulley 21 to the pulley 20. If this predetermined torque is exceeded, the torque transmission is limited due to the slipping of the rubber ring 30.
  • a rotation of the transport roller 8 leads to a transport of the ink ribbon 10 and to a rotation of the pulley 21.
  • the rotation of the pulley 21 is transmitted to the pulley 22 by means of the rubber ring 30 and leads to a rotation of the take-up spool 6, which then carries the transported ink ribbon 10 wound up.
  • the transmission ratio of the slip clutch 19 according to the invention must be 1 L 1, since the tip diameter of the transport roller 8 is approximately as large as the diameter of the spool core of the take-up spool 6 small winding diameter of the ribbon 10 on the take-up spool 6
  • the transmission ratio is defined as the ratio of the speed of the pulley 21 to that of the pulley 20.
  • the ribbon cassette 1 has an elastic, angled pressure bracket 32, on which the pressure roller 9 is rotatably supported at one end and which is guided in the housing 2 so as to be pivotable at the other end.
  • 4 shows a side view of the pressure bracket 32. It consists of a plastic web 33 and has a receiving extension 34 on one end and a bearing pin 35 on the other. The bearing pin 35 projects beyond the plastic web 33 on one side.
  • the receiving extension 34 is claw-like (FIG. 5) and serves to receive the pressure roller 9.
  • the pressure roller 9 has two roller sections 36 provided with involute teeth 18, which are connected to one another via an axial connecting web 37 .
  • the connecting web 37 which is circular in cross section according to FIG. 5, is clipped into the claw-like receiving extension 34.
  • the end of the bearing pin 35 which laterally projects beyond the plastic web 33 and is circular in cross section, is pivotably mounted in a bore 38 in the base 3 of the housing 2 in accordance with FIG. 1.
  • a circular arch-shaped support wall 39 is partially arranged around the bearing pin 35 on the base 3.
  • the pressure bracket 32 is pivoted in the direction of the transport roller 8 (FIG. 1). so that the pressure roller 9 bears against the transport roller 8 with pretension. This allows tolerances in the manufacture of the individual parts of the ribbon cassette 1 according to the invention to be compensated for.
  • the involute toothing has a module of 0.3 to 1.0, preferably 0.5.
  • the present invention is not limited to a pressure roller 9 consisting of two roller sections 36; rather, the pressure roller 9 can also be designed differently and be stored in a different way.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
EP85100540A 1984-04-13 1985-01-19 Cassette pour ruban encreur à jeter Withdrawn EP0164488A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848411658 DE8411658U1 (de) 1984-04-13 1984-04-13 Singlestrike-farbbandkassette
DE8411658U 1984-04-13

Publications (2)

Publication Number Publication Date
EP0164488A2 true EP0164488A2 (fr) 1985-12-18
EP0164488A3 EP0164488A3 (fr) 1988-05-25

Family

ID=6765898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100540A Withdrawn EP0164488A3 (fr) 1984-04-13 1985-01-19 Cassette pour ruban encreur à jeter

Country Status (2)

Country Link
EP (1) EP0164488A3 (fr)
DE (1) DE8411658U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5376951A (en) * 1989-06-07 1994-12-27 Alps Electric Co., Ltd. Thermal transfer printer and ribbon cassette for use in the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415539A1 (fr) * 1978-01-30 1979-08-24 Exxon Research Engineering Co Cartouche a ruban pour machine imprimante
DE2618379B2 (de) * 1976-04-27 1980-04-30 Triumph Werke Nuernberg Ag, 8500 Nuernberg Endlosfarbbandkassette für Schreibund ähnliche Maschinen
DE3221272A1 (de) * 1981-07-20 1983-05-19 James Richard Danville Calif. Daughters Universal-farbbandkassette fuer druck- oder schreibmaschinen
DE3314448A1 (de) * 1982-04-21 1983-11-03 Envision Technology Inc., 95134 San Jose, Calif. Bandkassette fuer einen drucker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2618379B2 (de) * 1976-04-27 1980-04-30 Triumph Werke Nuernberg Ag, 8500 Nuernberg Endlosfarbbandkassette für Schreibund ähnliche Maschinen
FR2415539A1 (fr) * 1978-01-30 1979-08-24 Exxon Research Engineering Co Cartouche a ruban pour machine imprimante
DE3221272A1 (de) * 1981-07-20 1983-05-19 James Richard Danville Calif. Daughters Universal-farbbandkassette fuer druck- oder schreibmaschinen
DE3314448A1 (de) * 1982-04-21 1983-11-03 Envision Technology Inc., 95134 San Jose, Calif. Bandkassette fuer einen drucker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5376951A (en) * 1989-06-07 1994-12-27 Alps Electric Co., Ltd. Thermal transfer printer and ribbon cassette for use in the same

Also Published As

Publication number Publication date
EP0164488A3 (fr) 1988-05-25
DE8411658U1 (de) 1984-07-12

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Inventor name: HORNUNG, MICHAEL