EP2455224B1 - Method for printing on both sides of paper, paper feeding apparatus, and printer paper - Google Patents

Method for printing on both sides of paper, paper feeding apparatus, and printer paper Download PDF

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Publication number
EP2455224B1
EP2455224B1 EP10799551.6A EP10799551A EP2455224B1 EP 2455224 B1 EP2455224 B1 EP 2455224B1 EP 10799551 A EP10799551 A EP 10799551A EP 2455224 B1 EP2455224 B1 EP 2455224B1
Authority
EP
European Patent Office
Prior art keywords
sheet
pin
perforation
pins
drive 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.)
Active
Application number
EP10799551.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2455224A4 (en
EP2455224A1 (en
Inventor
Iwao Matsumoto
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.)
Photo Craft Co Ltd
Original Assignee
Photo Craft Co Ltd
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 Photo Craft Co Ltd filed Critical Photo Craft Co Ltd
Publication of EP2455224A1 publication Critical patent/EP2455224A1/en
Publication of EP2455224A4 publication Critical patent/EP2455224A4/en
Application granted granted Critical
Publication of EP2455224B1 publication Critical patent/EP2455224B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41J11/26—Pin feeds
    • 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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/10—Selective handling processes
    • B65H2301/13—Relative to size or orientation of the material
    • B65H2301/132—Relative to size or orientation of the material single face or double face
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/20—Belt drives
    • B65H2403/21—Timing belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/12—Single-function printing machines, typically table-top machines

Definitions

  • Silver-halide color films have been widely used in the past as image display media such as lit advertising signs and lit signboards. In recent years, however, an image display medium provided by printing an image onto a print sheet with an inkjet printer has often been used.
  • Examples of a recording sheet for transmitted light used in an inkjet printer are: recording material formed by providing a porous structured ink accepting layer containing titanium oxide therein (Patent Document 2: Japanese Laid-open Patent Publication No. 2004-167706 ); and a film material having an ink receiving layer containing therein water-containing silica particles and a water-retaining material (Patent Document 3: Japanese Laid-open Patent Publication No. 2001-135859 ).
  • Patent Document 4 Japanese Laid-open Patent Publication No. 2003-312131 .
  • Patent Document D2 When the sheet disclosed in Patent Document D2, D3, or D4 is used for double-sided printing of images, the sheet positioning is difficult, which makes it impossible to register images with high accuracy.
  • double-sided printing of images on such a conventional sheet after an image is printed onto the obverse of the sheet, the sheet is turned inside out and is placed in a correct position as much as possible, and an image is printed onto the other side (reverse) of the sheet. If misregistration occurs after printing is started, position correction is performed on an as-needed basis.
  • a continuous form has been conventionally used which is provided with perforations at both ends thereof for sheet feed. Since such a conventional continuous form is small like B5 size or A3 size and lightweight, it can be fed by a conventional pin tractor feed mechanism. In addition, the sheet positioning accuracy required is approximately 1 mm or less because the conventional continuous form is primarily used for letter printing.
  • the ideal lit signboard has a structure in which a backlight is provided on the rear of an image, and the illumination on the obverse of the image by the backlight is higher than that on the obverse of the image by outside light. Such a condition is satisfied easily indoors while the condition is not satisfied easily outdoors.
  • the reason for this is as follows. Environment light within doors is artificial lighting, and the illumination on the obverse by the artificial lighting is not so high. Accordingly, if the light source of lighting from the reverse satisfies a predetermined condition, lightness on the reverse can be higher than the lightness on the obverse. In contrast, environment light outside is the sunlight, and the illumination on the obverse by the sunlight is very high. Accordingly, it is very difficult that lightness on the reverse is higher than the lightness on the obverse.
  • the beauty of night view in a big city is created by geometric patterns by artificial lighting.
  • lighting of buildings is turned ON with some exceptions.
  • building windows in the daytime seem to be totally different from those at night. This is attributed to the difference in brightness between artificial lighting and the sunlight.
  • the illumination of surface light source of a lit advertising sign or lit signboard is approximately 5000-6000 lux in average, while the illumination of the sunlight is as high as 100000 lux.
  • the difference in illumination causes the difference in contrast, so that light from building windows within doors cannot be observed in the daytime.
  • the ideal lit advertising sign has a structure in which images are created on both surfaces of a reflectable material, the images have appropriate brightness for viewing even if environment light on the obverse of the image is the sunlight or artificial light, and the images are visible with backlight at night. While silver-halide color films are not perfect as an image display medium for an image for the ideal lit advertising sign, there has been no material for lit advertising sign serving as substitutes for the color films. JP 2008093846 shows a method for printing on both sides of a sheet according to the preamble of claim 1.
  • the present invention is made in view of the problems described above, and an object of the present invention is to provide a method for printing an image onto both sides of a large sheet with high accuracy, a sheet feeder for carrying the large sheet with high accuracy of positioning, and a print sheet.
  • a method is a method for printing an image onto both sides of a sheet.
  • the method includes using a sheet having perforations formed at both ends of the sheet for sheet feed; using a feeder including a drive roller and two pin tractors, the drive roller rotating to drive the sheet in contact with the sheet, and the pin tractors including a plurality of pins to engage the perforations and being disposed in both ends of the drive roller to rotate to drive the sheet with a coaxial rotational driving force with the drive roller; disposing the sheet in the feeder, and, in this state, conveying the sheet synchronously with movement of the pins to print an image onto one side of the sheet; and turning the sheet, onto one side of which printing has been performed, inside out and is disposed in the feeder, and, in this state, conveying the sheet synchronously with the movement of the pins to print an image onto another side of the sheet.
  • the pin is formed to have a shape which makes a distance between a front base position of the pin at a time when the perforation of the sheet starts to disengage from the pin and a front position of the pin on a line along a movement direction of the sheet after the pin is moved equal to a distance of a movement of the front base position of the pin.
  • a printer 1 is provided with a body 11, a delivery roller 12, a drive roller 13, a pin tractor 14, a pressure roller 15, a recording head 16, a platen box 17, a fan 18, a sheet guide 19, a control circuit, and the like.
  • the printer 1 is connected to a computer via a non-illustrated interface.
  • the printer 1 can be controlled through operation of a pointing device such as a keyboard.
  • the control details, an image, and so on can be displayed on a non-illustrated display.
  • the sheet PY has perforations PA on both ends for sheet feed.
  • the perforations PA are aligned at regular intervals along the length direction of the sheet PY.
  • Each of the perforations PA has a circular shape.
  • the rim of the perforation PA is cut out along the circumference thereof.
  • the perforation PA has, on its rim, no jaggies which avoid interference with a pin.
  • the outer surface of a pin comes in contact with the rim of the perforation PA, and thereby, the positional relationship therebetween is defined appropriately.
  • the sheet PY also has marks MKP indicating the correspondence relationship between the positions of perforations PA formed on one of the edges of the sheet PY and the positions of perforations PA formed on the other edge.
  • One mark MKP is provided for a predetermined number of perforations PA. In the illustrated example of Figs. 7 and 8 , one mark MKP is provided for five perforations PA.
  • the mark MKP may be a black dot, a color dot, an arrow, or the like.
  • the mark MKP may be a hole.
  • the marks MKP indicate that perforations PA formed on the right or left of the marks MKP are located at the same position in the longitudinal direction. Accordingly, it is possible to optionally select the number, position, and shape of the marks MKP, and a method for adding the marks MKP as long as the marks MKP indicate which perforations PA are provided at the same position in the longitudinal direction.
  • the delivery roller 12 serves to deliver the sheet PY to the drive roller 13 and the pin tractors 14.
  • the delivery roller 12 may be or may not be provided with pins to engage with the perforations PA.
  • a guide plate may be provided instead of the delivery roller 12. Alternatively, a guide plate may be provided together with the delivery roller 12.
  • the drive roller 13 and the pin tractors 14 cooperate with the pressure roller 15 to correctly position the sheet PY with high accuracy, and to convey the sheet PY.
  • the drive roller 13 rotates to drive the sheet PY in contact with the lower surface of the sheet PY.
  • the pin tractors 14 are provided on both ends of the drive roller 13.
  • Each of the pin tractors 14 has a plurality of pins PN to engage the perforations PA, for sheet feed, formed on both ends of the sheet PY.
  • the pin tractors 14 rotate to drive the sheet PY with a coaxial rotational driving force with the drive roller 13.
  • the pin tractors 14 are driven to rotate by a drive shaft having the same axis as that of the drive roller 13. It is therefore easy to synchronize sheet delivery by the pin tractors 14 with sheet delivery by the drive roller 13.
  • pin tractor 14 on the left-hand side of Fig. 2 is sometimes referred to as a "pin tractor 14a" and the pin tractor 14 on the right-hand side of Fig. 2 is sometimes referred to as a "pin tractor 14b”.
  • the pressure rollers 15 are so provided as to face the drive roller 13 and the pin tractors 14, and serve to press the sheet PY against the drive roller 13 and the pin tractors 14.
  • the pressure roller 15a is gently pressed against the drive roller 13. This prevents large friction from being produced on a contact surface between the drive roller 13 and the sheet PY. As a result, slight misalignment between the drive roller 13 and the sheet PY is tolerated.
  • a force exerted by a spring that presses the roller 15a is preferably weakened.
  • the weight of the pressure roller 15a may be reduced.
  • the perforations PA reach not the bases TN of the pins PN but the other parts of the pins PN in some cases. In such a case, the sheet PY is not properly conveyed through the pins PN.
  • the sheet feeder YH is constituted by the drive roller 13, the pin tractors 14, and the pressure rollers 15a and 15b.
  • the sheet feeder YH is driven to rotate at a controlled speed by a non-illustrated power conveyance mechanism such as a motor, a gear, or a belt.
  • the sheet feeder YH delivers the sheet PY synchronously with the movement of the pins PN. Then, the drive roller 13 rotates to send the sheet PY forward. Stated differently, both ends of the sheet PY are conveyed by the pin tractors 14, and the middle part of the sheet PY is conveyed by the drive roller 13. The conveyance speed by the pin tractors 14 is the same as that by the drive roller 13. Consequently, the sheet PY is linearly conveyed precisely at a controlled speed without being skewed or being loosened.
  • the conveyance by the pin tractors 14 is dominant compared to the conveyance by the drive roller 13, and the sheet PY is conveyed synchronously with the movement of the pins PN of the pin tractors 14.
  • the conveyance speed by the pin tractors 14 is applied, and therefore, the drive roller 13 sends the sheet PY forward at substantially the same speed as the conveyance speed by the pin tractors 14.
  • the driver roller 13 may be structured to have a diameter slightly smaller than that of the main roller 141 in order that the conveyance by the pin tractors 14 is dominant.
  • the two pin tractors 14 have marks MKT showing the positional correspondence relationship in the conveyance direction between the pins PN provided in the pin tractor 14a and the pins PN provided in the pin tractor 14b.
  • the marks MKT indicate that pins PN provided on the right or left of the marks MKT are located at the same position in the longitudinal direction. Accordingly, it is possible to optionally select the number, position, and shape of the marks MKT, and a method for adding the marks MKT as long as the marks MKT indicate which pins PN are provided at the same position in the longitudinal direction.
  • the recording head 16 Immediately after the sheet feeder YH delivers the sheet PY, the recording head 16 performs color printing on the obverse of the sheet PY by the inkjet method.
  • the recording head 16 is attached to a non-illustrated carriage reciprocating along with a rail.
  • the carriage reciprocates above the platen box 17 in a manner to cross over the sheet PY in the width direction thereof with a small gap kept between the carriage and the sheet PY.
  • the recording head 16 has an ink nozzle facing the upper surface of the platen box 17. The ink nozzle blows ink onto the sheet PY adsorbed on the upper surface of the platen box 17, so that an image GZ is printed onto the sheet PY.
  • the movement direction of the recording head 16 is a Y-direction orthogonal to the X-direction.
  • the sheet PY is moved in the X-direction and the recording head 16 moves in the Y-direction, and thereby, the image GZ is printed onto the XY-plane that is the obverse of the sheet PY.
  • the position of the image GZ generated by using ink blown from the recording head 16 and the position of the sheet PY in the XY-direction should have a predetermined proper relationship. Further, in order that the images GZ to be printed onto both sides of an identical sheet PY are registered at high accuracy with respect to each other, the sheet PY is required to be placed precisely at the correct position in the sheet feeder YH, and to be conveyed correctly without any misalignment.
  • the pin tractor 14 is used to convey the sheet PY, the position of the sheet PY is precisely defined thanks to the pins PN engaging the perforations PA of the sheet PY, and no misalignment occurs during the conveyance of the sheet PY.
  • the pin PN is formed to have a shape which makes the distance between the front base position of the pin PN at a time when the perforation PA of the sheet PY starts to disengage from the pin PN and the front position of the pin PN on a line along the movement direction of the sheet PY after the pin PN is moved equal to the distance of the movement of the front base position of the pin PN.
  • the pin PN is formed to have a shape which allows the pin PN to move, during a period from when the pin PN engages the perforation PA to when the pin PN is disengaged therefrom, in the direction which allows the front of the pin PN to be disengaged from the perforation PA in contact with the front rim of the perforation PA.
  • the sheet PY onto which the image GZ is printed by the recording head 16 is outputted along the sheet guide 19.
  • the drive roller 13 integrally has drive shafts 13a and 13b that extend linearly from both ends thereof.
  • the drive shafts 13a and 13b are rotatably supported at ends thereof by bearings 21a and 21b attached to the body 11.
  • the drive shafts 13a and 13b are rotationally driven by a non-illustrated power conveyance mechanism.
  • the drive roller 13 may be integrated by, for example, providing a screw in the inner peripheral surface of both ends of a hollow pipe, and by engaging threadedly, therein, a boss or threaded shaft to be screwed in the screw.
  • One of the drive shafts i.e., the drive shaft 13a has, on its surface, a key groove provided in the axial direction.
  • a key 22 2 is fitted into the key groove.
  • the pin tractor 14a is provided with a key groove 23 to engage the key 22.
  • the key groove 23 engages the key 22, and is axially movable along the key 22.
  • the pin tractor 14a is also provided with a setscrew 24. The axial position of the pin tractor 14a is adjusted, and the setscrew 24 is fastened. Thereby, the position of the pin tractor 14a is fixed in the axial direction.
  • the pin tractor 14b is also provided with a setscrew. After the position of the pin tractor 14b is adjusted in the axial direction, the setscrew is fastened. Thereby, the position of the pin tractor 14a is fixed.
  • rollers 131 and 132 are interposed between the drive roller 13 and the pin tractor 14a to fill the space therebetween.
  • the rollers 131 and 132 have the same outer diameter as that of the drive roller 13.
  • Each of the rollers 131 and 132 is provided with a key groove to engage the key 22.
  • the rollers 131 and 132 are axially movable along the key 22.
  • Each of the rollers 131 and 132 is also provided with a setscrew. When the setscrew is fastened, the position of each of the rollers 131 and 132 is fixed in the axial direction.
  • rollers 131 and 132 it is possible to appropriately select the number of rollers 131 and 132, the length thereof in the axial direction, and the like.
  • the rollers 131 and 132 may be attached to the drive shaft 13a.
  • the outer peripheral surface of a pin PN is in the form of a circumferential surface, and the pin PN has a cannonball shape forming a smooth carve from the bottom position TN to the tip position TS of the pin PN.
  • the pin PN is inserted through a perforation PA of a sheet PY, and the front bottom position TN of the pin PN contacts the front rim of the perforation PA of the sheet PY.
  • DN outer diameter of the pin PN at the bottom position TN
  • DA inner diameter of the perforation PA
  • a pin PN provided ahead by one pitch is sometimes referred to as a pin PNZ.
  • the pin PNZ is a state where a ridge formed by an imaginary surface MK extended from the outer peripheral surface of the pin PNZ and a plane MH passing through the tip position TS contacts the front rim of a perforation PA. In short, this state shows the moment at which the pin PNZ is disengaged from the perforation PA.
  • a pin PN provided behind by one pitch is sometimes referred to as a pin PNG.
  • Fig. 9 shows diagrams depicting how a sheet PY is conveyed with the rotation of the pin tractor 14.
  • Fig. 9A shows the same state as that of Fig. 6 described above. Under the state, the bottom position TN of the pin PN contacts the perforation PA at the part surrounded by a broken-line circle.
  • Fig. 9B through Fig. 9F show the individual states in which the pin tractor 14 rotates by a predetermined angle in the direction denoted by the arrow M1. After the state shown in Fig. 9F , the state goes back to that of Fig. 9A again. In Fig. 9A through Fig. 9F , the bottom position TN of the pin PN contacts the perforation PA at the parts surrounded by broken-line circles.
  • Fig. 9A through Fig. 9D only one pin PN contacts the perforation PA at the bottom position TN of the pin.
  • Fig. 9E and Fig. 9F two pins PN and PNG contact the perforations PA at the individual bottom positions TN of the pins PN.
  • conveyance and positioning of the sheet PY is taken over from the pin PN to the pin PNG.
  • the bottom position TN is set at the origin, the tangential direction of the surface of the main roller 141 is set as the U-axis, and a direction vertical to the U-axis is set as the V-axis.
  • the peripheral shape of the pin PN is determined by obtaining the coordinates of the individual points on the curve CV in such a UV-plane.
  • the U-axis and the V-axis move in accordance with the rotational angle of the main roller 141. It is assumed that the position of the origin is a position at which the bottom position TN of the pin PN is directly above the pin tractor 14, i.e., a position at which the pin PN is on the contact position of the main roller 141 and the sheet PY, the rotational angle on that position is set at zero degrees, and the rotational angle therefrom is set at ⁇ degrees. With respect to the U-axis and the V-axis at various rotational angles ⁇ degrees, coordinates of the contact position P to the sheet PY may be determined.
  • U is calculated as follows.
  • r denotes the radius of the main roller 141. Since it is assumed that the circumferential velocity due to the rotation of the main roller 141 is in synchronization with the conveyance speed of the sheet PY, the value "C" denoting the conveyance distance of the sheet PY is equal to the length of the circumference corresponding to the rotational angle ⁇ .
  • the curve CV shown in Fig. 12 is rotated with respect to the centerline TC of the pin PN, so that the outer peripheral surface of the pin PN is formed.
  • a part of the curve CV far away from the origin corresponds to a line represented as the imaginary surface MK as discussed above.
  • peripheral shape of the pin PN can be determined in the following manner.
  • the centerline TC of the pin PN is set as the V-axis, and a tangential line vertical to the V-axis on the surface of the main roller 141 is set as the U-axis.
  • the peripheral shape of the pin PN is determined by obtaining the coordinates of the individual points on the curve CV in such a UV-plane.
  • the U-axis and the V-axis move in accordance with the rotational angle of the main roller 141. It is assumed that the position of the origin is a position at which the pin PN is directly above the pin tractor 14, i.e., a position at which the pin PN is on the contact position of the main roller 141 and the sheet PY, the rotational angle on that position is set at zero degrees, and the rotational angle therefrom is set at ⁇ degrees. With respect to the U-axis and the V-axis at various rotational angles ⁇ degrees, coordinates of the contact position P to the sheet PY may be determined.
  • U is calculated as follows.
  • ⁇ ′ ′ ⁇ + ⁇ ′
  • ⁇ ' denotes a bias angle of the bottom position TN with respect to the centerline TC of the pin PN.
  • the bias angle ⁇ ' is obtained as follows.
  • ⁇ ′ arc sin rp / r where rp denotes the maximum value of the radius of the pin PN. If the maximum value of the outer diameter of the pin PN is 3 millimeters, the value of the rp is 1.5 millimeters.
  • the value "C” denoting the conveyance distance of the sheet PY is equal to the length of the circumference corresponding to the rotational angle ⁇ . Note, however, that the value "C” in Equations (3) and (4) is the length of the circumference corresponding to the rotational angle ⁇ plus the bias angle ⁇ '.
  • the pin PN having the shape discussed above is a rotor.
  • a pin PN can be formed by cutting a metal material or a synthetic resin material.
  • Alternatively, such a pin PN may be formed by metallic molding, and polishing may be performed after molding. Since the front half of the pin PN is important in order that the pin PN positions the sheet PY, only the front half of the pin PN may be finished precisely.
  • the pin PN is formed to have a cannonball shape in this embodiment, the pin PN may be formed to have a cone shape. Further, although the pin PN has a circular shape as viewed from the tip position TS thereof, the pin PN may have a rectangular or polygonal shape as viewed from the tip position TS instead of the circular shape.
  • the pin tractor 14 discussed above is a roller with pins PN in which the main roller 141 has pins PN. Instead, however, the pin tractor 14 may be provided with a timing belt.
  • the pin tractor 14B is provided with a casing 31, two rollers 32 and 33 rotatably attached to the casing 31 by bolts BT, a timing belt 34 running between the two rollers 32 and 33, a timing gear 35 that is rotatably provided in the casing 31 and is rotationally driven by a drive shaft 13a to drive the timing belt 34 rotationally, and so on.
  • the timing belt 34 has, on its outer peripheral surface, pins PN to engage perforations PA formed on a sheet PY.
  • the timing belt 34 is in parallel with the sheet PY between a position corresponding to the timing gear 35 and a position corresponding to the roller 33.
  • the timing belt 34 gently slopes down toward the roller 32 from the timing gear 35 so as to be gradually away from the sheet PY.
  • a sheet keeping device SA which includes a hold-down roller 15B attached to a printer, a hold-down lever 43 rotatably provided with respect to a shaft 44, and a spring 44.
  • the rotation of the drive shaft 13a rotates the timing gear 35 integrally, and thereby, the timing belt 34 engaging the timing gear 35 runs.
  • the pins PN engaging the perforations PA move the sheet PY.
  • the sheet PY is delivered accurately in the direction denoted by the arrow M2 in the parallel part between the position corresponding to the timing gear 35 and the position corresponding to the roller 33 because the plurality of perforations PA engage the pins PN sufficiently.
  • the timing belt 34 gradually moves away from the sheet PY in the slope from the position corresponding to the timing gear 35 and the position corresponding to the roller 32. Along with this, the pins 36 are disengaged from the perforations PA smoothly.
  • the pin PN has a cannonball shape, and the shape of the pin PN can be determined as described earlier with reference to Fig. 9 through Fig. 14 .
  • the pin tractor 14B may have a structure, shape, and so on different from the foregoing.
  • a structure is possible in which a roller similar to the rollers 32 and 33 is provided at the position of the timing gear 35, the timing gear 35 is provided between the roller and the roller 32, and thereby the timing belt 34 is driven.
  • the method uses a sheet PY having perforations PA on both ends thereof for sheet feed, and the sheet feeder YH that has a drive roller 13 rotating to drive the sheet PY in contact with the sheet PY, and two pin tractors 14a and 14b which have pins PN to engage the perforations PA and are disposed on both ends of the drive roller 13 to rotate to drive the sheet PY by a coaxial rotational driving force with the drive roller 13.

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EP10799551.6A 2009-07-14 2010-05-10 Method for printing on both sides of paper, paper feeding apparatus, and printer paper Active EP2455224B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009165284A JP5349180B2 (ja) 2009-07-14 2009-07-14 用紙の両面に印刷する方法、用紙搬送装置、およびプリンタ用紙
PCT/JP2010/003159 WO2011007487A1 (ja) 2009-07-14 2010-05-10 用紙の両面に印刷する方法、用紙搬送装置、およびプリンタ用紙

Publications (3)

Publication Number Publication Date
EP2455224A1 EP2455224A1 (en) 2012-05-23
EP2455224A4 EP2455224A4 (en) 2015-12-23
EP2455224B1 true EP2455224B1 (en) 2016-07-27

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Application Number Title Priority Date Filing Date
EP10799551.6A Active EP2455224B1 (en) 2009-07-14 2010-05-10 Method for printing on both sides of paper, paper feeding apparatus, and printer paper

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EP (1) EP2455224B1 (ja)
JP (1) JP5349180B2 (ja)
WO (1) WO2011007487A1 (ja)

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Publication number Priority date Publication date Assignee Title
JP2013103428A (ja) * 2011-11-15 2013-05-30 Seiko Epson Corp インクジェット用連続用紙、インクジェットプリンター、およびインクジェットプリンターの予備吐出方法

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JPS60230879A (ja) * 1984-05-02 1985-11-16 Oki Electric Ind Co Ltd 紙送り装置
JPS631563A (ja) * 1986-06-20 1988-01-06 Nec Home Electronics Ltd 高品位カラ−プリンタ
US4981244A (en) * 1988-02-08 1991-01-01 International Business Machines Corp. Pin belt for movement of perforated strip
JPH01229668A (ja) * 1988-03-11 1989-09-13 Oki Electric Ind Co Ltd 印字装置
JPH0319867A (ja) * 1989-06-16 1991-01-29 Nec Niigata Ltd プリンタ用給排紙装置
JPH059947U (ja) * 1991-07-23 1993-02-09 株式会社新興製作所 プリンタの用紙誤セツト防止装置
JPH0535303U (ja) * 1991-10-24 1993-05-14 ブラザー工業株式会社 用紙送り機構
JPH06271159A (ja) * 1993-03-16 1994-09-27 Toshiba Corp 印字システム
JPH11249346A (ja) * 1998-02-27 1999-09-17 Hitachi Koki Co Ltd 連続紙の記録装置
JP3615104B2 (ja) 1999-08-26 2005-01-26 ローム株式会社 電子部品の電磁シールド用キャップおよび赤外線データ通信モジュール
JP2001335183A (ja) 2000-05-25 2001-12-04 Mutoh Ind Ltd インクジェットプリンタにおける記録媒体搬送機構
JP2003312131A (ja) 2002-04-24 2003-11-06 Nisshinbo Ind Inc インクジェット記録用シート
JP2004167706A (ja) 2002-11-15 2004-06-17 Somar Corp インクジェット記録材料
JP2008093846A (ja) * 2006-10-06 2008-04-24 Fuji Xerox Co Ltd 画像形成装置

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JP5349180B2 (ja) 2013-11-20
EP2455224A4 (en) 2015-12-23
JP2011020292A (ja) 2011-02-03
WO2011007487A1 (ja) 2011-01-20
EP2455224A1 (en) 2012-05-23

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