EP0006483A1 - Einspannvorrichtung an einer Schreibwalze für Blätter verschiedener Länge - Google Patents

Einspannvorrichtung an einer Schreibwalze für Blätter verschiedener Länge Download PDF

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Publication number
EP0006483A1
EP0006483A1 EP79101720A EP79101720A EP0006483A1 EP 0006483 A1 EP0006483 A1 EP 0006483A1 EP 79101720 A EP79101720 A EP 79101720A EP 79101720 A EP79101720 A EP 79101720A EP 0006483 A1 EP0006483 A1 EP 0006483A1
Authority
EP
European Patent Office
Prior art keywords
drum
sheet
axis
fixing
active position
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
EP79101720A
Other languages
English (en)
French (fr)
Other versions
EP0006483B1 (de
Inventor
Donald Lee Jackson
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 EP0006483A1 publication Critical patent/EP0006483A1/de
Application granted granted Critical
Publication of EP0006483B1 publication Critical patent/EP0006483B1/de
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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/22—Clamps or grippers
    • B41J13/223—Clamps or grippers on rotatable drums

Definitions

  • the present invention relates to a device for fixing the front and rear edges of a sheet of paper and more particularly, a device for fixing the front and rear edges of sheets of paper of variable length.
  • Another method of holding a sheet of paper against the surface of a drum or roller is to provide fasteners or other fasteners on the exterior surface of the drum to secure the sheet to the drum and allow it to rotate with this one.
  • the clips hold the sheet of paper in a fixed position against the surface of the cylinder and eliminate any risk of it sliding on the surface of the cylinder.
  • fasteners are more effective than a retaining rod in certain printing techniques, for example in inkjet printing, their use has a drawback.
  • Sheets of paper of variable length cannot be immobilized by the fasteners which are arranged at a certain distance from each other equal to the length of the sheets to be printed. Any change in the length of the paper sheets will shutdown the printing system to adjust the position of the clips to the length of the new paper sheets. This process can cause extremely significant loss of time when the sheets of paper are not of constant length during a printing operation.
  • the object of the present invention is to overcome this drawback.
  • the drum is of the type comprising front edge fasteners and rear edge fasteners of the sheets.
  • the front edge attachments are carried by a support integral with the drum and are operated either manually or automatically when the leading edge of the sheet has been brought against them.
  • the rear edge fasteners are normally separated from the drum and are not integral in rotation with the latter.
  • a detector on the rear edge of the sheets controls on the one hand the active positioning of the fasteners and on the other hand their fastening in rotation with the drum thanks to a clutch system which couples the axis of the drum with a flange supporting the rear edge fasteners.
  • the invention particularly has the advantage of providing efficient means for fixing the sheets on a printer drum which do not require either the shutdown of the printing system or manual intervention, to adapt the position of the fixing means to the length of leaves.
  • the sheets are thus effectively fixed on the drum regardless of their length and the order in which they succeed one another. It is nevertheless preferable that the maximum length of the sheets is less than the circumference of the drum.
  • Figure 1 is a perspective view of a printing drum assembly comprising the fixing system of the present invention.
  • Figure 2 is a partial perspective view taken from the right end of the print drum assembly of Figure 1, the drum being shown without paper.
  • Figure 3 is a sectional view of the printing drum assembly of Figure 2 taken along lines 3-3.
  • a paper tray 10 carries and guides a sheet of paper 12 on the printing drum 14.
  • the drum 14 is rotated on an axis 16 which carries other devices which will be commented on later.
  • fasteners for the front edge of the sheets of paper 18 are arranged along the length of the drum 14 to fix the front edge of the sheet of paper 12.
  • the fasteners 18 are closed simultaneously by a actuating lever with central articulation 20 which can be actuated manually or automatically.
  • the fasteners 18 and the actuation lever 20 both rotate with the drum 14 on the axis 16.
  • the outer surface of the drum 14 has grooves 22 which act as guide zones for the fingers 24 introduced into these grooves when a sheet is removed from the printing system. The removal of the sheet of paper 12 from the surface of the printing drum 14 will be discussed during the description of the operation of the device.
  • each flange 26 On each side of the printing drum 14, there are flanges 26.
  • the flanges 26 are mounted so as to rotate independently of the shaft 16 which passes through the drum 14 in its longitudinal direction.
  • a guide path 28 is provided on each of the flanges 26 for guide a curved actuating arm 30.
  • a solenoid 31 with a plunger core shown diagrammatically in FIG. 3 moves the actuating arm 30 in rotation by means of connecting rods and pinions (not shown), in the path of guide 28 or out of it.
  • each flange 26 carries a clutch 32 with toothed sector 34 which is pivotally mounted on an axis 33 carried by the flange.
  • a control lever 35 integral with the clutch 32 allows the latter to pivot, when the arm 30 is engaged in the guide path 28 and comes to stress the end of the lever 35.
  • Toothed wheels 36 are fixedly mounted on the axis 16 on each side of the printing drum 14 and are integral in rotation with the latter.
  • a return spring 39 (FIG. 2) keeps the toothed sector 34 of the clutch 32 in contact with the teeth 38 of the toothed wheel. 36 and consequently to secure in rotation the wheel 36 and the flange 26.
  • the clutch 32 is released from the wheel 36 and the flange 26 is blocked in rotation in a determined position.
  • a stud 40 is provided on each flange 26 in the immediate vicinity of the guide path 28 to carry a central pinion 42 and a movable plate 44.
  • the central pinion 42 is fixedly mounted on the stud 40 and the movable plate 44 is rotatably mounted on this same stud.
  • the movable plate 44 can pivot around the stud 40 under the action of the solenoid 31 indicated above thanks to the cooperation of a stud 46 carried by the plate 44 with a finger 47 carried by the arm 30.
  • a satellite pinion 48 is mounted in rotation on an axis carried by the movable plate 44 in a position adjacent to the central pinion 42 so that the teeth of the pinion 48 mesh with the teeth of the pinion 42.
  • the axis of the satellite pinion 48 describes an arc of a circle around the axis of the central pinion 42 when the movable plate 44 pivots about the axis of the stud 40, while the pinion 48 itself rotates around its own axis.
  • the shaft on which the pinions 48 are mounted also carries the fastener 50 from the rear edge of the sheet of paper. Consequently, when the pinions 48 are rotated, the rear edge fastener of sheets of paper 50 follows their rotational paths.
  • the fastener 50 is always returned to the surface of the drum 14 by springs 52 fixed to studs 54 mounted on the flange 26.
  • the print drum 14 When the machine is initially placed in paper loading mode, the print drum 14 slowly rotates counterclockwise, as seen in Figure 1.
  • the sheet of paper 12 is advanced on the paper tray 10 under the trailing edge fastener of paper sheet 50 and in the trailing edge fasteners of sheet of paper 18.
  • the printing drum 14 continues to rotate counterclockwise and the sheet of paper 12 rotates with it .
  • the front edge fasteners of sheets of paper 18 can either be closed manually, by tilting the actuation lever 20 towards the surface of the drum 14 or mechanically, by the use of a cam-cam follower arrangement. .
  • the guiding surface acting as a cam could be mounted on the surface of the flange 26, in a position adjacent to the drum 14.
  • the cam follower would be connected to the actuating lever 20 and provided so as to follow the guide surface of the cam when the latter is driven in movement by the flange 26 in order to ensure opening and closing sheet edge fasteners 18.
  • the fasteners 18 are not controlled by detectors, their rest position is detected by a detector which will be described later.
  • the actuating arm 30, as seen in FIG. 2 is engaged in the guide path 28 and the teeth 34 of the toothed sector clutch 32 do not mesh with the teeth 38 of the wheel 36.
  • the sheet rear edge attachment 50 is open and released from the surface of the drum 14.
  • An optical detector 41 of the rear edge of the sheet shown in FIG. 3 detects the passage of the rear edge of the sheet, through the opening 43 formed in the paper tray 10, and actuates a chronology unit 45 which sends a signal to the drum drive control logic (not shown) to drive the drum 14 for a specified period of time and distance to allow the entire length of the sheet 12 to be pulled over the surface of the drum 14.
  • the chronology unit 45 also de-energizes the solenoid 31 to allow the curved actuating arm 30 to leave the guide path 28 and to control the mechanical operations which will be described below.
  • the detectors used in the present invention could be pneumatic, mechanical, electrical, or a combination of these various types.
  • a mechanical clutch operation takes place simultaneously with the mechanical movements described above.
  • the lever 35 of the toothed sector clutch 32 is released from the curved actuating arm 30 and the toothed sector is pulled towards the wheel 36 by the spring 39 in order to cause the gearing of the teeth. 34 and 38.
  • the flange 26 can now be rotated with the wheel 36 and the drum 14.
  • the drum control logic described above locates the position of the drum where the rear edge attachment 50 a grabbed the rear edge of the sheet of paper 12.
  • a reverse sequence of the steps described above is initiated.
  • the solenoid 31 is excited via the chronology unit 45 and the curved actuating arm 30 enters the guide path 28 to separate the flange 26 and the toothed sector clutch 32 from the wheel 36, this which isolates the flange 26 from the rotary movement of the drum 14.
  • the solenoid excited at the same time as the curved arm 30, causes the introduction of the guide fingers 24 into the grooves 22 of the drum 14.
  • the solenoid also causes rotation in the direction schedule of the movable plate 44 and causes the movement of the pinion gear 48 around the central pinion 42 and causes the attachment of the rear edge of the sheet 50 at the same time.
  • the clockwise movement of the movable plate 44 causes the sheet rear edge fastener 50 to separate from the drum 14.
  • the drum 14 is rotated clockwise and the sheet of paper it carries follows the guide fingers 24 and is directed upwards on the paper tray 10.
  • the detector described above and ensuring the detection of the initial tightening point of the front edge fasteners 18 during the loading operation detects this position again.
  • the movement of the drum is stopped and the sheet front edge fasteners 18 are open.
  • the sheet of paper 12 can now be manually removed from the surface of the drum 14 and the paper tray 10.

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  • Handling Of Cut Paper (AREA)
EP79101720A 1978-06-28 1979-06-01 Einspannvorrichtung an einer Schreibwalze für Blätter verschiedener Länge Expired EP0006483B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92030778A 1978-06-28 1978-06-28
US920307 1978-06-28

Publications (2)

Publication Number Publication Date
EP0006483A1 true EP0006483A1 (de) 1980-01-09
EP0006483B1 EP0006483B1 (de) 1982-05-12

Family

ID=25443547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101720A Expired EP0006483B1 (de) 1978-06-28 1979-06-01 Einspannvorrichtung an einer Schreibwalze für Blätter verschiedener Länge

Country Status (4)

Country Link
EP (1) EP0006483B1 (de)
JP (1) JPS555889A (de)
DE (1) DE2962788D1 (de)
IT (1) IT1165107B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0077400A1 (de) * 1981-04-20 1983-04-27 Matsushita Electric Industrial Co., Ltd. Vorrichtung zum aufwickeln eines aufnahmeblatts
US5182573A (en) * 1989-11-30 1993-01-26 Samsung Electronics Co., Ltd. Multi-color-thermal printer with a movable printer head
EP1027220A1 (de) * 1997-10-14 2000-08-16 Powis Parker Inc. Ordneretikettendrucker und verfahren
CN102555538A (zh) * 2010-10-13 2012-07-11 株式会社东芝 记录介质的输送装置及其输送方法、图像形成装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173353U (ja) * 1984-04-24 1985-11-16 ソニー株式会社 プラテンの紙挾み機構

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263563A (en) * 1939-10-04 1941-11-25 Blum Milton Typewriter platen
US2707545A (en) * 1951-02-27 1955-05-03 Remington Rand Inc Card holding platen
DE2024271A1 (de) * 1970-05-19 1971-12-02 Triumph Werke Nuernberg Ag Vorrichtung zum automatischen Ein schalten der Transportmittel an Vorsteckein richtungen für Schreib , Buchungs und ahnl Maschinen
DE2349217B2 (de) * 1973-10-01 1976-07-15 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum haltern eines schreibblattes in einem aufzeichnungsgeraet mit einer drehbar gelagerten trommel
US4101018A (en) * 1975-08-22 1978-07-18 Teletype Corporation Paper edge sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4929924A (de) * 1972-07-20 1974-03-16

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263563A (en) * 1939-10-04 1941-11-25 Blum Milton Typewriter platen
US2707545A (en) * 1951-02-27 1955-05-03 Remington Rand Inc Card holding platen
DE2024271A1 (de) * 1970-05-19 1971-12-02 Triumph Werke Nuernberg Ag Vorrichtung zum automatischen Ein schalten der Transportmittel an Vorsteckein richtungen für Schreib , Buchungs und ahnl Maschinen
DE2349217B2 (de) * 1973-10-01 1976-07-15 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum haltern eines schreibblattes in einem aufzeichnungsgeraet mit einer drehbar gelagerten trommel
US4101018A (en) * 1975-08-22 1978-07-18 Teletype Corporation Paper edge sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0077400A1 (de) * 1981-04-20 1983-04-27 Matsushita Electric Industrial Co., Ltd. Vorrichtung zum aufwickeln eines aufnahmeblatts
EP0077400A4 (de) * 1981-04-20 1984-09-26 Matsushita Electric Ind Co Ltd Vorrichtung zum aufwickeln eines aufnahmeblatts.
US5182573A (en) * 1989-11-30 1993-01-26 Samsung Electronics Co., Ltd. Multi-color-thermal printer with a movable printer head
EP1027220A1 (de) * 1997-10-14 2000-08-16 Powis Parker Inc. Ordneretikettendrucker und verfahren
EP1027220A4 (de) * 1997-10-14 2001-09-05 Powis Parker Inc Ordneretikettendrucker und verfahren
CN102555538A (zh) * 2010-10-13 2012-07-11 株式会社东芝 记录介质的输送装置及其输送方法、图像形成装置

Also Published As

Publication number Publication date
IT1165107B (it) 1987-04-22
JPS555889A (en) 1980-01-17
IT7923797A0 (it) 1979-06-22
DE2962788D1 (en) 1982-07-01
EP0006483B1 (de) 1982-05-12

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