EP0013339B1 - Cassette de ruban sans fin - Google Patents

Cassette de ruban sans fin Download PDF

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Publication number
EP0013339B1
EP0013339B1 EP79104870A EP79104870A EP0013339B1 EP 0013339 B1 EP0013339 B1 EP 0013339B1 EP 79104870 A EP79104870 A EP 79104870A EP 79104870 A EP79104870 A EP 79104870A EP 0013339 B1 EP0013339 B1 EP 0013339B1
Authority
EP
European Patent Office
Prior art keywords
ribbon
spool
roll
tape
winding
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
Application number
EP79104870A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0013339A3 (en
EP0013339A2 (fr
Inventor
Gerald Carl Sienkiewicz
Donald Joseph Mac Quade
Herbert Gene Leonard
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.)
International Business Machines Corp
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0013339A2 publication Critical patent/EP0013339A2/fr
Publication of EP0013339A3 publication Critical patent/EP0013339A3/fr
Application granted granted Critical
Publication of EP0013339B1 publication Critical patent/EP0013339B1/fr
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
    • B41J32/00—Ink-ribbon cartridges
    • B41J32/02—Ink-ribbon cartridges for endless ribbons
    • 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
    • B41J33/02—Ribbon arrangements
    • B41J33/10—Arrangements of endless ribbons

Definitions

  • the present invention relates generally to reels of strip material and more particularly to an endless ribbon cassette which can be used in printing devices.
  • Another difficulty encountered in the devices of the prior art is caused by the significant increase in the combined pressure in all the outer turns and by the friction thus generated at the point where the ribbon leaves the inner periphery of the coil.
  • a significant problem is still posed by wrinkling, gathers and faulty feeding of the ribbon when it is unwound and offset by 90 °.
  • the object of the present invention is therefore to provide an improved cartridge or cassette in which a freely rotating spool has a roll of tape which can be removed freely and with minimal friction from the inner turn of the roll and rewound on the outer coil.
  • Figure 1 shows a roll 1A of endless tape or ribbon 1 carried by a spool 2 rotating freely on a hub 3, the assembly being protected by the upper and lower flanges 4.
  • the assembly is generally considered to be a cassette containing a reel.
  • the inner turn of the ribbon roll 1A is continuously withdrawn by means not shown, then is rewound on the outer periphery of the spool.
  • a major problem encountered in the devices represented in FIG. 1 generally lies in the fact that the combined pressure of the outer turns of the strip on the inner turn applies the tape in close contact on the outer surface of the core. winding and creates friction that must be overcome to remove the tape from the spool. Since the tape is removed from the inner periphery of the roller and causes the spool to rotate, there is both vertical friction due to sliding when the inner coil is removed and horizontal friction also due sliding when the ribbon is offset in the horizontal plane and crosses the thickness of the roll contained between the sides of the cassette which contains the reel. This is a major problem, especially with the fabric type ribbons used in typewriters. The friction generated is large enough to cause irregular feeding and winding and may even be high enough to cause jams. All this contributes to an undesirable deterioration in the quality of the printing since the ribbon cannot unwind normally.
  • Figure 1 shows a coil 2, the winding core has an upper side 5 and a lower side 6.
  • the upper side 5 has a radius slightly less than that of the lower side 6 for a purpose which will be explained later.
  • the coil 2 is mounted on a hub 3 which can carry the upper and lower flanges 4 of the cassette as seen in the figure.
  • the coil 2 rotates freely on the hub 3 and can preferably be made of nylon or a similar plastic material allowing regular rotation of the coil.
  • a groove 7 is machined in the peripheral surface of the winding core between its sides 5 and 6 and decreases the contact area between the inner surface of the ribbon roll and the outer surface of the spool in a manner known in the art. prior art.
  • the width L of the groove (see Figure 5) must be equal to or greater than the width of the ribbon as will be described in detail later.
  • Figure 2 is a top view of the cassette of Figure 1.
  • the top side 5 is of a polygonal shape which, in the case of the preferred embodiment of the present invention, is hexagonal, although any polygonal shape with sides of equal length or not, can be used.
  • the radial distance separating the center of the hub 3 from the ends or vertices of the upper polygonal side 5 is less than the radial distance separating the same center of the hub 3 from the periphery of the lower side 6.
  • the spool turns freely on the hub 3 which can present a central passage 8 allowing the assembly of the entire device on an axis or other element fixed in the printing machine actually using the cassette.
  • the upper and lower flanges 4 are of the same dimension and appear as a whole in Figure 2.
  • the ribbon is removed from the inner periphery of the roll 1A by the flat edges of the polygonal upper side 5 and offset in the plane horizontal when it crosses the roll between the flange 4 and the upper surface of the roll 1A before being extracted from the spool for its use, then it is rewound on the outer periphery of the roll of tape on the spool.
  • Figure 3 is a partially cut perspective view of the coil while a feeding operation is in progress and the flanges 4 are removed.
  • the ribbon is removed in the direction of the arrow from the inner periphery of the winding 1A and is rewound on the outer periphery of the roll by the rotation of the spool 2 on the hub 3, caused by the forces exerted by the tape 1 by withdrawing from the inner periphery of the roll 1A in a manner well known in the prior art.
  • Figure 4 is a top view of the preferred embodiment of the coil used in the present invention and shows the upper side 5 thereof.
  • the length of the flat edges of the polygon forming the upper side 5 is indicated by H and the width of the ribbon 1 is indicated by W.
  • Figure 5 is a horizontal sectional view of the device of the preferred embodiment shown in Figure 4.
  • the upper side 5 of polygonal shape has a radius at its apices lower by N than the radius of the circular side 6 which forms the bottom of the coil 2.
  • the roller 1A bears against the circular side 6 and is therefore circular.
  • the ribbon 1 is wound on the circular side 6 of the reel 2 and the vertices 5 on the hexagonal side are set back by a distance N which corresponds to at least two thicknesses of ribbon so that the vertices of the hexagon of the side 5 are on a circle whose diameter is approximately less than a three thicknesses of tape to the diameter of the circular side 6.
  • a cassette produced according to the teachings of the present invention and containing a roll of endless fabric tape has a more freely rotating spool, which allows an easy and regular flow of the tape from the central periphery of the roll as well as better rewinding of said tape on the outer periphery of said roll.
  • the application of a minimum withdrawal force is sufficient and allows wider use of the cassette of the present invention in printing machines. It is simply necessary to mount the cassette in the desired position and to provide extraction or feed rollers to pull the ribbon from the inner periphery of the ribbon roll.
  • the ribbon can be fed through the printing machine and rewound on the outer periphery of the roll in its cassette by the forces exerted by said ribbon when it is withdrawn from the internal periphery of the roll.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Winding Of Webs (AREA)
  • Advancing Webs (AREA)
EP79104870A 1979-01-03 1979-12-04 Cassette de ruban sans fin Expired EP0013339B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/000,746 US4236678A (en) 1979-01-03 1979-01-03 Endless ribbon cartridge
US746 1997-12-30

Publications (3)

Publication Number Publication Date
EP0013339A2 EP0013339A2 (fr) 1980-07-23
EP0013339A3 EP0013339A3 (en) 1981-04-08
EP0013339B1 true EP0013339B1 (fr) 1983-06-01

Family

ID=21692849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104870A Expired EP0013339B1 (fr) 1979-01-03 1979-12-04 Cassette de ruban sans fin

Country Status (6)

Country Link
US (1) US4236678A (it)
EP (1) EP0013339B1 (it)
JP (1) JPS5823310B2 (it)
CA (1) CA1109045A (it)
DE (1) DE2965591D1 (it)
IT (1) IT1165404B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467976A (en) * 1982-10-04 1984-08-28 International Business Machines Corporation Ribbon cartridge comprising a stuffer box intermediate a supply reel and take-up reel
JPS6026314A (ja) * 1983-07-22 1985-02-09 J S Shoko Kk 眼鏡におけるつるの芯金に樹脂塗料等の有色材をもつて文字等を表示する方法
JPS62158420U (it) * 1986-03-29 1987-10-08
US4840502A (en) * 1986-05-09 1989-06-20 Ncr Corporation Thermal transfer ribbon cassette
JPH0455019U (it) * 1990-09-18 1992-05-12

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025012A (en) * 1958-04-17 1962-03-13 Res Interests Ltd Device for re-winding an endless tape
FR1324300A (fr) * 1962-03-05 1963-04-19 Bobine à couvercle pour films cinématographiques, bandes magnétiques, rubans et bandes en papier ou autres matières et pour tous usages similaires et connexes
US3220663A (en) * 1964-01-06 1965-11-30 Phillip A Plato Adapter for typewriter machines
JPS4930738B1 (it) * 1967-11-25 1974-08-15
JPS5414495B1 (it) * 1969-04-17 1979-06-07
US3620467A (en) * 1969-09-03 1971-11-16 Rca Corp Endless loop tape cartridge
JPS4920212A (it) * 1972-06-16 1974-02-22
US3917186A (en) * 1974-02-15 1975-11-04 Solo Products Corp Magnetic tape spool
JPS52159612U (it) * 1976-05-28 1977-12-03

Also Published As

Publication number Publication date
IT1165404B (it) 1987-04-22
EP0013339A3 (en) 1981-04-08
CA1109045A (en) 1981-09-15
EP0013339A2 (fr) 1980-07-23
US4236678A (en) 1980-12-02
JPS5823310B2 (ja) 1983-05-14
IT7928243A0 (it) 1979-12-20
DE2965591D1 (en) 1983-07-07
JPS5593752A (en) 1980-07-16

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