EP0411587A2 - Cassette pour ruban encreur ayant des bobines d'enroulement, utilisée dans un dispositif d'enregistrement - Google Patents

Cassette pour ruban encreur ayant des bobines d'enroulement, utilisée dans un dispositif d'enregistrement Download PDF

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Publication number
EP0411587A2
EP0411587A2 EP90114715A EP90114715A EP0411587A2 EP 0411587 A2 EP0411587 A2 EP 0411587A2 EP 90114715 A EP90114715 A EP 90114715A EP 90114715 A EP90114715 A EP 90114715A EP 0411587 A2 EP0411587 A2 EP 0411587A2
Authority
EP
European Patent Office
Prior art keywords
ink sheet
recording
reel
ink
recording apparatus
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.)
Granted
Application number
EP90114715A
Other languages
German (de)
English (en)
Other versions
EP0411587B1 (fr
EP0411587A3 (en
Inventor
Minoru C/O Canon Kabushiki Kaisha Yokoyama
Takashi C/O Canon Kabushiki Kaisha Awai
Yasushi C/O Canon Kabushiki Kaisha Ishida
Akihiro C/O Canon Kabushiki Kaisha Tomoda
Masakatsu C/O Canon Kabushiki Kaisha Yamada
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP2196194A external-priority patent/JP2729409B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0411587A2 publication Critical patent/EP0411587A2/fr
Publication of EP0411587A3 publication Critical patent/EP0411587A3/en
Application granted granted Critical
Publication of EP0411587B1 publication Critical patent/EP0411587B1/fr
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
    • B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
    • B41J17/32—Detachable carriers or holders for impression-transfer material mechanism

Definitions

  • This invention relates to an ink sheet reel on which an ink sheet used in the heat transfer recording system can be wound, an ink sheet cartridge using said ink sheet reel, and a recording apparatus using these.
  • recording apparatus covers, for example, a facsimile apparatus, a typewriter, a copying apparatus and a printer.
  • the facsimile apparatus of this heat transfer recording type has the advantages that plain paper or the like can be used as a recording sheet and that images can be recorded clearly.
  • a supply reel for supplying an ink sheet and a take-up reel for taking up the ink sheet from the supply reel are loaded into a loading portion such as a recording cover, or the supply reel and the take-up reel as an ink sheet cartridge (hereinafter referred to as the ink cartridge) contained in a container are loaded into the loading portion such as the recording cover, and in order to enable this loading to be accomplished smoothly and easily, there is provided some gap axially of the reels between the supply reel or the take-up reel and the loading portion.
  • spur gears are used as power transmission gears of the take-up reel and supply reel sides and power transmission gears of the conveying drive system side. Therefore, if a gap is provided between the supply reel or the take-up reel and the loading portion as previously described, the take-up reel and the supply reel may have lush in the axial direction, and this in turn leads to the disadvantage that oblique movement or skew or wrinkling of the ink sheet and unsatisfactory take-up of the ink sheet are caused.
  • axial pressure side pressure
  • spring means or the like becomes necessary, and this means an increased number of parts.
  • Typical means of the present invention for achieving these object is characterized by being constituted by an ink sheet winding portion on which an ink sheet can be wound, and power transmission means provided in said ink sheet winding portion and creating an axial thrust in said ink sheet winding portion.
  • An ink sheet reel on which an ink sheet to which the means of the prevent invention is applied can be wound, an ink sheet cartridge using such ink sheet reel, and a recording apparatus using these will hereinafter be described with respect to a preferred embodiment thereof with reference to the drawings.
  • the embodiment described hereinafter is designed such that when a rotational force is transmitted to a gear which is power transmission means, an axial thrust is produced in the ink sheet winding portion of an ink sheet reel and the ink sheet winding portion is pressed toward on axial end side by this thrust and in the loading portion of the recording apparatus side, this ink sheet winding portion is stopped. Also, at this time, it is desirable that the thrust of the ink sheet reel of the supply side and the thrust of the ink sheet reel of the take-up side act in the same direction.
  • the ink sheet reels may not jolt and oblique movement or the like of the ink sheet will not occur.
  • the recording apparatus A is constructed as the recording system of a facsimile apparatus.
  • Figure 1A is a pictorial perspective view of the facsimile apparatus
  • Figure 1B is a cross-sectional view of the facsimile apparatus
  • Figures 2A and 2B are perspective views of the recording apparatus A.
  • the facsimile apparatus is comprised of the recording apparatus A as the recording system, a reading system B for reading the image of an original, and an operation panel C.
  • the recording apparatus A forms an image on a recording sheet 1 in comformity with an image signal transmitted from other apparatus or an image signal transmitted from the reading system B which will be described later.
  • the recording sheet 1 and an ink sheet 2 overlapping with each other are urged against a platen roller 4 by a recording head 3 as recording means, and by the platen roller 4 being driven in the direction of arrow, the recording sheet 1 is conveyed in the direction of arrow a, and by a driving mechanism 44 which will be described later, the ink sheet 2 is conveyed in the direction of arrow b.
  • the recording head 3 is driven in conformity with an image signal, whereby ink applied to the ink sheet 2 is melted (including sublimation) and the melted ink is transferred to the recording sheet 1 to thereby form an image.
  • the recording sheet 1 on which a predetermined image has been formed is further conveyed in the direction of arrow a and is cut by a cutter 5, whereafter it is conveyed and discharged out of the recording apparatus A by a pair of conveying rollers 6.
  • the recording sheet 1 is contained in a roll holder 8 provided in the apparatus body 7.
  • the roll holder 8, the platen roller 4, the cutter 5 and the pair of conveying rollers 6 are provided in the apparatus body 7.
  • the ink sheet 2 is inserted in an ink cartridge 9 which will be described later.
  • the ink cartridge 9 is removably loaded in a recording cover 11 as a loading portion pivotably constructed in the apparatus body 7 through a pivot shaft 10.
  • the recording head 3 is provided at a predetermined location in the recording cover 11.
  • the reading system B applies a light to an original 12 and converts the reflected light therefrom into an electrical signal, and transmits this signal to other apparatus or the recording apparatus in conformity with the operation mode.
  • a plurality of originals 12 are placed on an original supporting table 13 formed on top of the recording cover 11, and these originals 12 are preliminarily conveyed by a preliminary conveying roller 14a and a pressing roller 14b and are separated and fed one by one by a separating roller 15a and a pressing piece 15b urged thereagainst, and the originals 12 are conveyed by a pair of conveying rollers 16a and 16b and discharged onto a discharge tray 17.
  • a light is applied from a light source 18 to the surface of the original 12 while the original 12 is being conveyed, and the reflected light therefrom is caused to pass to a photoelectric conversion element 21 such as a CCD via a mirror 19 and a lens 20, and the image signal thereof is transmitted to the reconding system of the recording apparatus in the case of the copy mode, and is transmitted to the recording system of other apparatus in the case of the transmission mode.
  • a photoelectric conversion element 21 such as a CCD via a mirror 19 and a lens 20
  • the operation panel C is a panel for performing operations such as the mode switching operation, and is provided with keys for the various operations.
  • This operation panel C is provided on the upper portion of an original conveying mechanism in the recording system B, and is constructed for pivoted movement relative to the apparatus body 7.
  • One side of the operation panel C is equipped with a telephone set D for effecting transmission and reception.
  • the reference numeral 22 designates an electric equipment substrate and the reference numeral 23 denotes a power source unit.
  • the recording sheet 1 may be plain paper, plastic film or a sheet of any other material to which ink is transferable.
  • a long footage of plain paper of B4 width or A4 width is used as the recording sheet 1.
  • a sheet roll 1a comprising the recording sheet 1 wound into the form of a roll is contained in the roll holder 8 provided at a predetermined location in the apparatus body 7 (substantially at the center of Figure 1B).
  • the recording sheet 1 may be urled.
  • a decurling shaft 43 is provided near that side of the roll holder 8 which is against to the platen roller 4.
  • the decurling shaft 43 rotates in conformity with tension acting on the recording sheet 1, and is designed to cooperate with a guide shaft 24 which will be described later to eliminate the curl of the recording sheet 1.
  • the present embodiment in order to achieve a reduction in the running cost, adopts the so-called multiprint system in which the recording sheet 1 and the ink sheet 2 are conveyed for recording with a velocity difference provided therebetween.
  • recording is effected with the conveyed length of the ink sheet 2 being made shorter than the conveyed length L of the recording sheet 1 (L/n : n>1), and as compared with the conventional recording system in which the conveyed length of the recording sheet is made equal to the conveyed length of the ink sheet 2, the use efficiency of the ink sheet 2 is n times as high.
  • the ink sheet 2 is constructed, for example, of four layers as shown in Figure 14 wherein an ink layer capable of transferring ink n times is provided on base film.
  • the second layer is base film which provides a support for the ink sheet 2.
  • the second layer may advantageously be aromatic polyamide film of high heat resisting property or condenser paper, but conventional polyester film will also stand use.
  • the thickness of this layer may advantageously be as small as possible in respect of the quality of print from its role as a medium, and may desirably be 3 ⁇ m - 8 ⁇ m because the strength of the film must be taken into consideration.
  • the third layer is an ink layer containing therein a quantity of ink which can be transferred n times to the recording sheet 1.
  • the chief components of this layer are resin such as EVA as an adhesive agent, carbon black or nigrosine dye for coloring, and carnauba wax or paraffin wax as a binding material, and these components are combined so as to stand n times of use in the same portion.
  • Sensitivity and density differ depending on the amount of application of this layer, which may desirably be about 4 g/m2 - 8 g/m2, although it can be chosen as desired.
  • the fourth layer is a top coating layer which is not concerned in printing and which is for preventing the ink of the third layer from being pressure-­transferred to the recording sheet 1, and is formed of transparent wax or the like. Thus, it is only the transparent fourth layer that is pressure-transferred, and the ground stain of the recording sheet 1 can be prevented.
  • the first layer is a heat resisting coat layer for protecting the second layer, i.e., the base film, from the heat of the recording head 3 which is a thermal head.
  • This heat resisting coat layer is suitable for multiprint in which heat energy for n lines may be applied to the same portion (when black information is continuous), but whether it should be used or not can be suitably chosen. Also, it is particularly effective for base film of relatively low heat resisting property such as polyester film.
  • the construction of the ink sheet 2 is not limited to what has been described above, but may also be an ink sheet comprising, for example, a base layer and a porous ink retaining layer provided on one side of the base layer and containing ink therein, or an ink sheet comprising base film and a heat resisting ink layer of minute porous net-like structure provided on the base film, the ink layer containing ink therein.
  • the material of the base film may be, for example, film of polyimide, polyethylene, polyester, polyvinyl chloride, triacetyl cellulose, nylon or the like, or paper.
  • the heat resisting coat layer is not always necessary, but the material thereof may be, for example, silicon resin, epoxy resin, fluorine resin, etholocellulose or the like.
  • the ink sheet 2 having heat-sublimated ink mention may be made of an ink sheet comprising a substrate formed of polyethylene terephthalate, polyethylene naphthalate, aromatic polyamide film or the like, and a color material layer provided thereon and formed of guanamine resin and fluorine resin and containing spacer particles and dyestuff.
  • a supply reel 25 and a take-up reel 26 constructed as will be described later are independently mounted in the recording cover 11 as the loading portion, and the ink sheet 2 wound on the supply reel 25 is taken up onto the take-up reel 26, whereby the sheet 2 can be conveyed to carry out image formation.
  • the ink sheet 2 in the present embodiment is loaded and held in a cartridge 9A (the cross-section of which is shown in Figure 6B) as the frame member of an ink cartridge 9 constructed as shown in Figures 3 to 6A-6B.
  • Figure 6A is an enlarged cross-­sectional view of the central portion of the cartridge 9A of Figure 6B.
  • the ink cartridge 9 is constructed with the supply reel 25 and the take-up reel 26 being mounted at predetermined locations in the cartridge 9A as the frame member and with the ink sheet 2 wound on the supply reel being extended onto the take-up reel 26 side to thereby load the cartridge with the ink sheet 2.
  • the cartridge 9A in the present embodiment is molded as a unit of plastic, whereby the number of parts and the assembling cost are reduced.
  • the cartridge 9A has a first housing 9a, a second housing 9b and doors 9c, 9d molded as a unit by plastic molding.
  • a thin-walled portion 9e formed with a thickness smaller than the thickness of the first housing 9a and the second housing 9b is provided in the connecting portion between the two housings 9a and 9b, and similar thin-walled portions 9f and 9g are provided in the connecting portions between the first housing 9a and the doors 9c and 9d formed substantially contrally of the housing 9a.
  • the doors 9c and 9d are connected together by a moustache-like connecting piece 9h.
  • the thin-walled portion 9e is constructed so as to serve as a hinge when the first housing 9a and the second housing 9b are closed in opposed relationship with each other after the supply reel 25 and the take-up reel 26 are inserted into the cartridge 9A. Also, the thin-walled portions 9f and 9g are constructed so as to serve as hinges when the doors 9c and 9d are opened by fork members 3c provided on both sides of the recording head 3 shown in Figure 2 when the ink cartridge 9 has been mounted in the recording apparatus A.
  • the thin-walled portions 9e-9g have flexibility and moderate strength. That is, the thicknesses of the thin-walled portions 9e-9g are set to appropriate dimensions in conformity with the plastic material used.
  • the thin-walled portions 9e-9g may be formed over the full length and may be intermittently formed with predetermined lengths.
  • the moustache-like connecting piece 9h (see Figures 3 and 4) connecting the doors 9c and 9d together serves to maintain the doors 9c and 9d closed and prevent dust from entering the interior of the ink cartridge 9 when the cartridge 9 is not used.
  • the form members 3c provided on the recording head 3 are formed with such dimensions that when loading the recording apparatus A with the ink cartridge 9, the fork members 3c bear against the doors 9c and 9d to thereby easily break away the doors 9c and 9d when the doors are opened.
  • the molding material of the cartridge 9A may be resin such as polypropylene resin or ABS resin.
  • a window 9i, for inserting the platen roller 4 therethrough is formed substantially centrally of the second housing 9b and a cut-away 9i2 for permitting the shaft portion 4b of the platen roller 4 to escape is formed continuously to the window 9i1.
  • Side plates 9a1 and 9b1 are formed upright on both sides of the first housing 9a and the second housing 9b, and the portions thereof which are adjacent to the thin-walled portion 9e and the open side are formed with curved surfaces of square circle. Also, in the open side curved surface, engagement recesses 9a2 are formed on the first housing 9a side, and restraining projections 9b2 for engagement with the engagement recesses 9a2 are formed on the second housing 9b side. Further, in the open side curved surfaces of the first housing 9a and the second housing 9b, there are formed restraining projections 9a3 and 9b3 adapted to be engaged with a restraining spring 41 provided on the recording cover 11 when the ink cartridge 9 is mounted in the recording cover 11.
  • guide pins 9j which provide guides when the ink cartridge 9 is mounted in the recording cover 11.
  • u-grooves 9k for loosely fitting therein bearings 27 mounted on the supply reel 25 and u-grooves 9l for loosely fitting therein bearings 27 mounted on the take-up reel 26.
  • the first housing 9a and the second housing 9b are formed with openings 9m through which the reel gear 25c of the supply reel 25 and the reel gear 26c of the take-up reel 26 may be exposed.
  • the reference character 9n designates an identifying portion adapted to contact with a sensor 50 provided in the recording cover 11 when the ink cartridge 9 is mounted in the recording cover 11, and identify the presence or absence of the ink cartridge 9 or the size or the like of the ink sheet 2 loaded in the ink cartridge 9, by the sensor 50.
  • the supply reel 25 and the take-up reel 26, as shown in Figure 3, have reel shafts 25a and 26a, respectively, having a longer dimension than the width dimension of the ink cartridge 9.
  • Flanges 25b1, 25b2, 26b1 and 26b2 each having a length substantially equal to the internal dimension of the ink cartridge 9 are provided on the reel shafts 25a and 25b.
  • Reel gears 25c and 26c as means for transmitting the motive power are integrally formed on the flanges 25b1 and 26b1, respectively.
  • the reel gears 25c and 26c are helical gears, and the torsional direction of the teeth of these reel gears 25c ard 26c is the direction from the flanges 25b, 26b, toward the flanges 25b2, 26b2, i.e., the direction in which a trust can be created in the reel shafts 25a and 26a at one axial end thereof.
  • the opposite ends of the reel shafts 25a and 26a are constructed so as to protrude outwardly of the reel gears 25c, 26c, and the flanges 25b2, 26b2.
  • the bearings 27 are rotatably mounted on these protruding ends. Accordingly, the reels 25 and 26 are loosely fitted in the grooves 9k and 9l through the bearings 27 when the reels 25 and 26 are mounted in cartridge 9A of the ink cartridge 9.
  • the bearings 27 protrude from the cartridge 9A of the ink cartridge 9 and are fitted into bearing grooves 39a, 39b, 40a and 40b formed in the apparatus body 7 of the recording apparatus A.
  • the supply reel 25 having the ink sheet 2 thereon and having the bearings 27 mounted on the opposite ends thereof is mounted in the U-grooves 9k of the second housing 9b.
  • the take-up reel 26 having the bearings 27 mounted on the opposite end thereof is mounted in the U-grooves 9l. Then, the leading end of the ink sheet 2 is drawn out from the supply reel 25 and is attached to the reel shaft 26a of the take-up reel 26 as by an adhesive tape.
  • the first housing 9a is bent about the thin-walled portion 9e and opposed to the second housing, and the engagement projections 9b2 are brought into engagement with the engagement recesses 9a2, whereby the ink cartridge 9 loaded with the ink sheet 2 as shown in Figures 4 and 5 can be manufactured.
  • the ink cartridge 9 is mounted in the recording cover 11 through a mounting groove 28 constructed as will be described later.
  • a recording unit is constituted by the recording head 3 and the platen roller 4.
  • the recording head 3 and the platen roller 4 are disposed in opposed relationship with each other.
  • the recording head 3 is pivotably provided in the recording cover 11, and the platen roller 4 is rotatably provided in the apparatus body 7.
  • the recording head 3 is a thermal head having a plurality of heat generating elements, and is pivotably mounted on a head supporting portion 3a provided in the recording cover 11. Also, the recording head 3 is biased toward the platen roller 4 by a spring 3b disposed between the head 3 and the recording cover 11. By this biasing force, the recording sheet 11 and the ink sheet 2 overlapping with each other are urged against the platen roller 4.
  • Fork members 3c are provided on both sides of the recording head 3. These fork members 3c open the doors 9c and 9d formed on the ink cartridge 9 when the cartridge 9 is mounted in the recording cover 11, and have the positioning function for engaging the shaft portion 4b of the platen roller 4 and thereby setting the position of the recording head 3 relative to the platen roller 4.
  • the platen roller 4 is provided downstream with respect to the direction of conveyance of the recording sheet 1, as shown in Figure 1B.
  • the platen roller 4 is formed with a roller portion 4a conforming to the width dimension of the recording sheet 1 (see Figures 2A and 2B).
  • Shaft portions 4b are formed at the opposite ends of the roller portion 4a, and the fork members 3c provided on the recording head 3 are engageable with the shaft portions 4b.
  • the platen roller 4 is driven by the drive force of a motor 29.
  • the motor 29 is secured to a side plate 7a of the apparatus body 7.
  • the rotation of the motor 29 is transmitted to the platen roller 4 through power transmission gears 30a-30c.
  • the platen roller 4 is rotated in the direction of arrow as shown in Figure 1B to thereby convey the recording sheet 1 in the direction of arrow a, and after the recording sheet 1 is cut by the cutter 5, the platen roller 4 is rotated in the direction opposite to the direction of arrow to thereby convey the recording sheet 1 in the direction opposite to the direction of arrow a.
  • the apparatus body 7 in which the platen roller 4, etc. are provided is formed into a lateral U-shape having rigidity as shown in Figure 2.
  • the apparatus body 7 is formed with side plates 7a and 7b on the opposite sides thereof, and the side plates 7a and 7b are connected together by a partition plate 7c.
  • the partition plate 7c has the function of spacing the recording apparatus A and the reading system B apart from each other.
  • the recording cover is openably and closably mounted on the apparatus body 7 through a pivot shaft 10.
  • the pivot axis of the recording cover 11 relative to the apparatus body 7 is positioned at the end thereof which is adjacent to the original supporting table 13 formed on top of the recording cover 11 and which is sideways of the operation panel C.
  • the recording cover 11 has its upper surface constructed as the original supporting table 13, which is formed with an inclined portion 13a downwardly inclined toward the reading system B. It is also constructed so that the horizontal portion 13b of the original supporting table 13 may be substantially flush with the upper surface of the operation panel C.
  • a shaft member 31 having pivot shafts 10 on the opposite sides thereof.
  • This shaft member 31 is constructed so as to protrude to that side of the recording cover 11 which is adjacent to the original supporting table 13 and to position the pivot shafts 10 sideways of the operation panel C.
  • the inclined portion 13a is provided with a slider 13c for guiding the original 12, the slider 13c being slidable in accordance with the size of the original 12.
  • each bracket 32 is formed with a pivot hole 10a for inserting thereinto a pivot shaft 10 provided on the recording cover 11.
  • the pivot hole 10a may be a round hole, but in the present embodiment, it is in the form of a slot in which the recording cover is longitudinally movable relative to the apparatus body 7.
  • the brackets 32 are constructed so as to position the pivot holes 10a formed therein at the sideways end of the operation panel C which is adjacent to the original supporting table 13. That is, they are constructed so as to position the pivot axis of the recording cover 11 at the sideways end of the operation panel C which is adjacent to the original supporting table 13.
  • a torsion coil spring 36 is mounted on a shaft portion 33c provided on a cover stay 33 for maintaining the open position of the recording cover 11 so that a braking force may be created by the spring 36.
  • the cover stay 33 is pivotably mounted on the side plate 7b of the apparatus body 7 and a pin 34 is provided on the recording cover 11.
  • the cover stay 33 is mounted on a mounting portion 35 provided on the side plate 7b.
  • the location of the mounting portion 35 is closer to the center of gravity G of the recording cover 11 than to the pivot shaft 10 which is the pivot axis of the recording cover 11 relative to the apparatus body 7.
  • the pin 34 is provided near the center of gravity of the recording cover 11.
  • the cover stay 33 is constituted by a plate member 33b formed with a groove 33a and a shaft portion 33c for mounting the torsion coil spring 36 thereon.
  • the groove 33a is such that an arcuate groove 33a1 is formed near the shaft portion 33c and a substantially straight groove 33a2 is formed continuously to the arcuate groove 33a1.
  • the pin 34 provided on the recording cover 11 is fitted in the goove 33a, and the rotational force of the recording cover 11 is transmitted to the cover stay 33 through the pin 34.
  • a projection 33a3 formed at one end of the groove 33a2 is for engaging the pin 34 to thereby maintain the open position of the recording cover 11.
  • a through-hole 33d is formed axially through the shaft member 33c.
  • the torsion coil spring 36 is mounted around the shaft member 33c.
  • One arm 36a of the torsion coil spring 36 is inserted in a groove 35b formed in the mounting portion 35 and is fixed to the apparatus body 7, and the other arm 36b is a free end.
  • the torsion coil spring 36 is mounted on the shaft member 33c in such a manner that it is freely tightened when the cover stay 33 pivots in a direction to close the recording cover 11 and it is freely loosened when the cover stay 33 pivots in a direction to open the recording cover 11.
  • the inner diameter of the torsion coil spring 36 is made substantially equal to or slightly smaller than the outer diameter of the shaft member 33c. Accordingly, a frictional load is always acting between the torsion coil spring 36 and the shaft member 33c.
  • the frictional load between the torsion coil spring 36 and the shaft member 33c becomes greater and the spring 36 is freely tightened, whereby a braking force acts on the cover stay 33.
  • the rotational torque acting on the shaft portion 33c of the cover stay 33 becomes smaller than the rotational torque acting on the pivot shaft 10 of the recording cover 11 and accordingly, it is possible to make the rigidity of the torsion coil spring 36 small.
  • the recording apparatus A of the present embodiment uses the heat transfer system.
  • this recording system is such that the recording sheet 1 and the ink sheet 2 are made to overlap with each other and the ink sheet 2 is heated in the form of an image pattern from the support sheet thereof, whereby the ink is melted and transferred to the recording sheet 1 to thereby form an image thereon. Therefore, the adhering force of the melted ink acts between the recording sheet 1 and the ink layer.
  • the conveying force acting on the recording sheet 1 is transmitted to the recording cover 11 by said adhering force through the ink sheet 2, and a force for moving the cover 11 in the direction of conveyance of the recording sheet 1 acts.
  • the ink When image formation is being normally carried out, the ink is melted and therefore, the adhering force is small and poses no problem. However, if during image formation, the melted ink solidifies for some reason or other with the recording sheet 1 and the ink sheet 2 overlapping with each other, a great adhering force will be created, whereby the recording cover 11 may be moved in the direction of conveyance of the recording sheet 1.
  • the recording cover 11 is fixed to the apparatus body 7 so that the recording cover 11 may not be moved in the longitudinal direction.
  • a shaft 37 is provided on the side plates 7a and 7b of the apparatus body 7 downstream with respect to the direction of conveyance of the recording sheet 1.
  • This shaft 37 is disposed with a predetermined degree of parallelism relative to the axial direction of the platen roller 4.
  • a pair of restraining member 38 are secured at a location opposed to the shaft 37.
  • Each of these restraining members 38 is formed into a fork-like shape having a U-groove 38a engaged by the shaft 37.
  • the inner diametrical dimension of the U-groove 38 is designed with a predetermined tolerance of engagement relative to the outer diametrical dimension of the shaft 37.
  • a line passing through the centers of the pair of U-grooves 38a is disposed parallel to the supply reel 25 and the take-up reel 26 for the ink sheet 2.
  • the adhering force created between the recording sheet 1 and the ink layer is transmitted to the recording cover 11 through the ink sheet 2 and is further transmitted to the apparatus body 7 through the restraining members 38 and the shaft 37.
  • the restraining members 38 and the shaft 37 fit together with a predetermined tolerance and thus, the recording cover 11 is not moved in the longitudinal direction.
  • the ink cartridge 9 is mounted in the recording cover 11 as the loading portion and the cover 11 is closed, whereby the longitudinal positions and the vertical positions of the reels 25 and 26 can be set by bearing grooves 39a, 39b, 40a, 40b and a support member 42, and by a thrust being caused to act on the reels 25 and 26, the lateral positions of the reels 25 and 26 can be set.
  • a mounting groove 28 for removably loading the loading portion with the ink cartridge 9 is provided in opposed relationship with both sides of the recording cover 11, as shown in Figure 2.
  • This mounting groove 28 is formed by a hook-shaped groove to restrain the guide pin 9j of the ink cartridge 9.
  • U-shaped bearing grooves 39a, 39b, 40a and 40b fitted to the bearings 27 fitted to the opposite ends of the reels 25 and 26 to position the bearings 27 are opposedly provided on the same extension at a predetermined interval.
  • the bearing grooves 39a and 40a are formed as U-grooves extending through the recording cover 11, and the bearing grooves 39b and 40b are formed as U-­grooves having their axial ends closed. Also, a restraining spring 41 for restraining the restraining projection 9b3 of the ink cartridge 9 is provided near the open end side of the recording cover 11.
  • Support members 42 are provided on the side plates 7a and 7b of the apparatus body 7 which are opposed to the bearing grooves 39a, 39b, 40a and 40b formed in the recording cover 11.
  • the support members 42 bear against the bearings 27 fitted to the opposite ends of the reels 25 and 26 and bias the bearings 27 toward the bearing grooves 39a, 39b, 40a and 40b, thereby maintaining the positions of the reels 25 and 26 relative to the recording cover 11.
  • Each of the support members 42 is comprised of a case 42a secured to the side plate 7a, 7b, a support piece 42b having one end thereof contained in the case 42a and the other end having a contact surface with respect to the bearing 27, and a spring contained in the case 42a.
  • the guide pin 9j of the ink cartridge 9 is fitted in and restrained by the hook-­shaped groove 28a, the ink cartridge 9 is rotated about the guide pin 9j and the restraining projection 9b3 is restrained by the restraining spring 41, whereby the ink cartridge 9 is mounted in the recording cover 11.
  • the bearings 27 fit in the respective bearing grooves 39a, 39b, 40a and 40b.
  • the bearings 27 are supported by the support pieces 42b of the support members 42 and are biased toward the bearing grooves 39a, 39b, 40a and 40b, whereby the reels 25 and 26 have their mounted positions relative to the recording cover 11 set.
  • the ink cartridge 9 when the ink cartridge 9 is to be mounted in the recording cover 11 as previously described, it is possible to cause the cartridge 9 to bear against the guide shaft 24 rotatably provided in the recording cover 11 as shown in Figure 1, and insert the cartridge along this guide shaft 24. Also, when the guide pin 9j of the ink cartridge 9 is fitted into the mounting groove 28 shown in Figure 2 and thereafter the ink cartridge 9 is rotated, the fork members 3c provided on both sides of the recording head 3 bear against the doors 9c and 9d of the ink cartridge 9 and break away and open the moustache-like connecting piece 9h connecting the doors 9c and 9d together, whereby the recording head 3 is inserted into the ink cartridge 9.
  • the longitudinal positions of the reels 25 and 26 are set by the bearing grooves 39a, 39b, 40a and 40b. Also, when the recording cover 11 is closed relative to the apparatus body 7, the vertical positions of the reels 25 and 26 are set by the bearing grooves 39a, 39b, 40a, 40b and the support members 42.
  • the senor 50 provided in the cover 11 bears against the identifying portion 9n of the ink cartridge 9 so as to be able to detect tle presence or absence of the ink cartridge 9 or the size or the like of the ink sheet 2 inserted in the ink cartridge 9.
  • the reel gear 26c of the take-up reel 26 may come into meshing engagement with a drive force transmitting gear 44a (see Figure 13) constituting a driving mechanism 44 for the take-up reel 26 provided in the recording cover 11 and the reel gear 25c of the supply reel 25 may come into meshing engagement with a tension transmitting gear 45a constituting a back tension imparting mechanism 45 provided in the apparatus body 7 as shown in Figure 2.
  • the reel gears 25c and 26c of the reels 25 and 26 are constructed of helical gears as previously described (see Figure 3).
  • the drive force transmitting gear 44a and tension transmitting gear 45a on the recording cover 11 side which mesh with the reel gears 25c and 26c are likewise constructed of helical gears.
  • the reel gear 26c of the take-up reel 26 and the drive force transmitting gear 44a on the recording cover 11 side are brought into meshing engagement with each other to cause a rotational force to act on the drive force transmitting gear 44a, thereby creating an axial thrust in the take-up reel 26.
  • the reel gear 25c of the supply reel 25 and the tension transmitting gear 45a on the recording cover 11 side are brought into meshing engagement with each other.
  • the supply reel 25 is rotated by the tension acting on the ink sheet 2.
  • the reel gear 25c creates an axial thrust in the supply reel 25.
  • the helical gears 25c and 26c are installed so that at this time, the thrusts of the ink sheet reel 25 on the supply side and the ink sheet reel 26 on the take-up side may act in the same direction.
  • the thrusts acting on the reels 25 and 26 are transmitted to the bearings 27 fitted in the bearing grooves 39b and 40b provided in the recording cover 11. Said thrusts are then transmitted from the bearings 27 to the recording cover 11 and after all, the reels 25 and 26 are supported by the cover 11 in a state in which they are positioned at the side end in the same direction.
  • the torsion angle of the helical gears is smaller than 3°, axial thrust will not be sufficiently obtained, and if the torsion angle is greater than 20°, axial thrust will become great but will hinder the rotation of the gears, and therefore the torsion angle is set to the range of 3° to 30°, and may preferably be set to the range of 4°-15°, and may most preferably be set to the range of 5°-10°.
  • the number of teeth of each of the reel gears 25c and 26c be set to e.g. 52 and the number of teeth of each of the drive force transmitting gear 44a and the tension transmitting gear 45a be set to e.g. 12. If the numbers of teeth of the gears 25c, 26c, 44a and 45a are so set, the optimum conveyance velocity of the ink sheet will be reasonably obtained and axial thrust will be obtained.
  • the multiprint system is adopted as the recording apparatus A, but in the case of such recording system, images are formed while the ink is sheared in the ink layer and therefore, to convey the ink sheet 2, there becomes necessary the frictional force between the ink sheet 2 and the recording head 3, plus the shearing force for the ink. For this reason, the conveying force for the ink sheet 2 need be greater than the conveying force when the conventional one-time ink sheet is used.
  • the ink sheet 2 be reliably conveyed by 1/n lines each time images for one line are formed on the recording sheet 1, and it becomes possible to enhance the quality of recorded images by ensuring said conveyance to be effected reliably.
  • a driving mechanism 44 for the take-up reel 26 for conveying the ink sheet 2 is provided on a side of the recording cover 11, as shown in Figure 2B.
  • the driving mechanism 44 is constructed as shown in Figure 13.
  • the driving mechanism 44 is such that a bracket 46 is secured to a side (in the present embodiment, the right side) of the recording cover 11 and a drive motor 44b is secured to the bracket 46.
  • a motor gear 44c is mounted on the shaft of the drive motor 44b.
  • a first reduction gear 44d, a second reduction gear 44e and a third reduction gear 44f which is formed integrally with the drive force transmitting gear 44a are rotatably mounted on the bracket 46 with a predetermined distance maintained between the shafts of the adjacent gears. Accordingly, the rotation of the drive motor 44b is reliably transmitted to the drive force transmitting gear 44a while being decelerated through the gears 44c to 44d-44f.
  • the rotation of the drive motor 44b is reliably transmitted to the drive force transmitting gear 44a and accordingly, it becomes possible to reliably convey the ink sheet 2 at a predetermined conveyance velocity.
  • the restraining member 38 is provided in the recording cover 11 and the shaft 37 engageable with the restraining member 38 is provided in the apparatus body 7, and by closing the recording cover 11, the restraining member 38 is engaged with the shaft 37, thereby preventing the movement of the recording cover 11 in the longitudinal direction.
  • the back tension imparting mechanism 45 for imparting back tension to the take-up reel 26.
  • the back tension imparting mechanism 45 as shown in Figures 2A and 2B, is provided on the side plate 7a of the apparatus body 7.
  • the back tension imparting mechanism 45 is comprised of a pivotable plate 45b2 constructed on the side plate 7a for pivotal movement about a pivot fucrum 45b1, a slide clutch 45c secured to the pivotable plate 45b2 and connected to the tension transmitting gear 45a, and a tension spring 45 for upwardly biasing the pivotable plate 45b2.
  • the recording cover 11 is opened as shown in Figure 8 and the sheet roll 1a is contained into the roll holder 8, and then the leading end of the recording sheet 1 is drawn out to the platen roller 4.
  • the ink cartridge 9 is mounted in the recording cover 11 in the manner described previously, whereby the ink sheet 2 is loaded and the cover 11 is closed.
  • the supply reel 25 and the take-up reel 26 mounted in the ink cartridge 9 are fitted into the bearing grooves 39a, 39b, 40a and 40b and thus, the reels 25 and 26 are positioned at predetermined locations.
  • the restraining member 38 provided on the recording cover 11 comes into engagement with the shaft 37 provided in the apparatus body, whereby the recording cover 11 is set at a predetermined position relative to the apparatus body 7 and is restricted in its longitudinal movement.
  • the original 12 is read in the reading system B and at the same time, an image signal is transmitted to the recording apparatus A.
  • the platen 4 is driven by the motor 29 to convey the recording sheet 1 in the direction of arrow a and the ink sheet 2 is conveyed in the direction of arrow b by the drive motor 44b.
  • the recording head 3 is driven in response to the transmitted image signal, whereby an image is formed on the recording sheet 1.
  • the recording sheet 1 on which a predetermined image has been formed is further conveyed in the direction of arrow a and, when the end portion of the image comes to the cutter 5, the cutter 5 is driven to cut the recording sheet 1.
  • the cut recording sheet is conveyed and discharged out of the apparatus by the pair of conveying rollers 6. Also, the recording sheet 1 is conveyed in the direction opposite to the direction of arrow a by the platen roller 4.
  • a predetermined image can be formed on the recording sheet 1.
  • the numbers of teeth of the drive force transmitting gear 44a and the tension transmitting gear 45a are the same, but gears having different numbers of teeth may also be used.
  • the conveyance velocity of the ink sheet by the drive force transmitting gear and the tension to the ink sheet by the tension transmitting gear and the back tension imparting mechanism can be selected independently of each other.
  • the numbers of teeth of the helical gears are chosen to 50 to 54
  • the number of teeth of the drive force transmitting gear 44a may be set to 14-20, preferably 16-18.
  • the number of teeth of the tension transmitting gear 45a may be set to 15-21, preferably 17-19.
  • the torsion angle of the helical gears may be set to the range of 3° to 30° with the thrust created by the helical gears being taken into account, and may preferably be set to the range of 5° to 20°, and may most preferably be set to the range of 10° to 16°.
  • the present invention is also applicable to a case where the recording apparatus is loaded with ink sheet reels (the supply reel 25 and the take-up reel 26) which are not contained in the cartridge 9A.
  • the multiprint system has been shown as being adopted as the heat transfer recording system, but the present invention is euqally applicable to a recording apparatus of the type in which ink is completely transferred to the recording sheet 1 by one time image recording.
  • the helical gears mentioned herein refer to a gear in which the tooth face is helical and the pitch surface is a cylindrical surface and a gear which has a thread or multiple threads and is of a similar shape.
  • the tooth face may be straight or curved relative to the cylindrical surface, or some of tooth faces may be opposite in direction on the cylindrical surface.
  • any gear which can create axial thrust is covered by the term "helical gears" used herein.
  • the recording cover 11 side is loaded with the ink cartridge 9 (the supply reel 25 and the take-up reel 26), but the apparatus body 7 side may also be loaded with the ink cartridge.
  • the ink cartridge 9 has been shown as having been molded as a unit by the use of plastic, but alternatively, the first housing 9a, the second housing 9b, etc. may be formed as discrete parts.
  • the cartridge 9A which is the frame member of the ink cartridge 9 is constructed so as to cover the ink sheet 2 substantially completely, except the portion in which the recording head 3, etc. are inserted, but alternatively, use may be made of a cartridge comprising a framework portion large enough to hold the ink sheet reels (the supply reel 25 and the take-up reel 26).
  • an ink sheet retaining ink therein from first is us ⁇ .d as the ink sheet 2, but of course, use may also be made of a sheet which does not retain ink therein when it is wound on the supply reel, but is made to retain ink therein after it is fed from the supply reel.
  • the sheet-like member wound on the supply reel may be any one capable of retaining ink therein, such as an ink sheet of the material as mentioned previously having minute porous net-like structure on the base film thereof.
  • the present invention is provided with an ink sheet winding portion on which an ink sheet can be wound, and power transmitting means provided in this ink sheet winding portion for creating an axial thrust in the ink sheet winding portion and therefore, can eliminate axial jolting without the necessity of providing spring means as in the prior art, thereby effectively preventing oblique movement or the like of the ink sheet and improving the quality of printing, as well as reducing the number of parts and achieving a reduction in cost.
  • An ink sheet reel capable of being loaded into a recording apparatus has an ink sheet winding portion on which an ink sheet can be wound, and power transmission means provided so as to create an axial thrust in the ink sheet winding portion.
EP90114715A 1989-08-01 1990-07-31 Cassette pour ruban encreur ayant des bobines d'enroulement, utilisée dans un dispositif d'enregistrement Expired - Lifetime EP0411587B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP19803189 1989-08-01
JP198031/89 1989-08-01
JP196194/90 1990-07-26
JP2196194A JP2729409B2 (ja) 1989-08-01 1990-07-26 インクシートカートリッジ及び記録装置

Publications (3)

Publication Number Publication Date
EP0411587A2 true EP0411587A2 (fr) 1991-02-06
EP0411587A3 EP0411587A3 (en) 1991-07-17
EP0411587B1 EP0411587B1 (fr) 1995-06-28

Family

ID=26509605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114715A Expired - Lifetime EP0411587B1 (fr) 1989-08-01 1990-07-31 Cassette pour ruban encreur ayant des bobines d'enroulement, utilisée dans un dispositif d'enregistrement

Country Status (7)

Country Link
EP (1) EP0411587B1 (fr)
KR (1) KR0124537B1 (fr)
CN (1) CN1025171C (fr)
AT (1) ATE124332T1 (fr)
CA (1) CA2022551C (fr)
DE (1) DE69020451T2 (fr)
ES (1) ES2074500T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102620259B1 (ko) * 2021-12-01 2024-01-03 디에스글로벌(주) 열전사 헤드 자동 보정장치

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212642A (ja) * 1982-06-04 1983-12-10 Toshiba Corp テ−プレコ−ダの駆動機構
JPS59204585A (ja) * 1983-05-07 1984-11-19 Mitsubishi Electric Corp 熱転写プリンタ
JPS6032687A (ja) * 1983-08-03 1985-02-19 Toshiba Corp 画像形成装置
JPS6118654A (ja) * 1984-07-02 1986-01-27 Hitachi Ltd 帯状媒体のカセツト構造
JPS63197679A (ja) * 1987-02-13 1988-08-16 Hitachi Ltd 熱転写記録装置およびインク紙カセツト
JPS63254085A (ja) * 1987-04-13 1988-10-20 Hitachi Ltd インク紙カセツト

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212642A (ja) * 1982-06-04 1983-12-10 Toshiba Corp テ−プレコ−ダの駆動機構
JPS59204585A (ja) * 1983-05-07 1984-11-19 Mitsubishi Electric Corp 熱転写プリンタ
JPS6032687A (ja) * 1983-08-03 1985-02-19 Toshiba Corp 画像形成装置
JPS6118654A (ja) * 1984-07-02 1986-01-27 Hitachi Ltd 帯状媒体のカセツト構造
JPS63197679A (ja) * 1987-02-13 1988-08-16 Hitachi Ltd 熱転写記録装置およびインク紙カセツト
JPS63254085A (ja) * 1987-04-13 1988-10-20 Hitachi Ltd インク紙カセツト

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 167 (M-488)(2223) 13 June 1986, & JP-A-61 18654 (NARUI) 27 January 1986, *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 475 (M-774) 13 December 1988, & JP-A-63 197679 (NAOHIRO) 16 August 1988, *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 48 (M-793) 3 February 1989, & JP-A-63 254085 (NAOHIRO) 20 October 1988, *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 65 (P-263) 27 March 1984, & JP-A-58 212642 (TAKAMASA) 10 December 1983, *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 158 (M-393)(1881) 3 July 1985, & JP-A-60 32687 (WATANABE) 19 February 1985, *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 73 (M-368)(1796) 3 April 1985, & JP-A-59 204585 (TOKURA) 19 November 1984, *

Also Published As

Publication number Publication date
CN1049823A (zh) 1991-03-13
DE69020451T2 (de) 1996-01-11
DE69020451D1 (de) 1995-08-03
CN1025171C (zh) 1994-06-29
EP0411587B1 (fr) 1995-06-28
CA2022551C (fr) 1994-11-29
ES2074500T3 (es) 1995-09-16
ATE124332T1 (de) 1995-07-15
EP0411587A3 (en) 1991-07-17
CA2022551A1 (fr) 1991-02-02
KR0124537B1 (en) 1997-11-28

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