EP0753475A2 - Vorrichtung zum Zuführen von flachen Materialien - Google Patents

Vorrichtung zum Zuführen von flachen Materialien Download PDF

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Publication number
EP0753475A2
EP0753475A2 EP96104381A EP96104381A EP0753475A2 EP 0753475 A2 EP0753475 A2 EP 0753475A2 EP 96104381 A EP96104381 A EP 96104381A EP 96104381 A EP96104381 A EP 96104381A EP 0753475 A2 EP0753475 A2 EP 0753475A2
Authority
EP
European Patent Office
Prior art keywords
drive
pinion
flat materials
sector
stack
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
EP96104381A
Other languages
English (en)
French (fr)
Other versions
EP0753475A3 (de
EP0753475B1 (de
Inventor
Giuseppe Bortolotti
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.)
Olivetti Tecnost SpA
Original Assignee
OCD SA
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 OCD SA filed Critical OCD SA
Publication of EP0753475A2 publication Critical patent/EP0753475A2/de
Publication of EP0753475A3 publication Critical patent/EP0753475A3/de
Application granted granted Critical
Publication of EP0753475B1 publication Critical patent/EP0753475B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0638—Construction of the rollers or like rotary separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
    • B65H1/022—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge with non-controlled means for advancing the pile to present the pile to the separating device, e.g. weights or spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0653—Rollers or like rotary separators for separating substantially vertically stacked articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile

Definitions

  • the present invention relates to a device for introducing flat materials to be treated, such as sheets and / or envelopes, for machines using these flat materials, comprising a magazine with a bottom and a front wall in which a stack of said flat materials is arranged and from which these flat materials are extracted one by one and introduced into the machine, drive members arranged on a drive shaft so as to move the highest flat material of the stack to bring it into the machine, the device further comprising at least one retaining member intended to retain the flat materials placed in the stack under the highest flat material.
  • Such devices are known for introducing sheets of paper used in printers, typewriters or even in other devices, such as photocopiers. These devices very frequently use, as a retaining member, lateral retaining corners under which the upper sheet is extracted during its introduction. If these retaining corners can be applied more or less successfully for use with relatively thin and not very rigid sheets, the use of thicker and rigid sheets or envelopes is no longer possible with this type of retaining members. . It has also been observed that these retaining corners leave marks on sheets of thin thickness during their extraction. In some known devices, the retaining corners have been retractably mounted by means of a control mechanism so that they can be separated when using relatively rigid materials. These retractable retaining corners are however impractical and of a relatively high cost price.
  • the object of the present invention is to remedy this drawback and to create a device allowing the introduction of flat printing materials of very different rigidity ranging from very thin sheet to cardstock or envelopes, while being of a construction very simple and very low cost.
  • the invention is characterized for this purpose by the fact that the retaining member is constituted by a material with fibrils arranged on the anterior wall of the store, the fibrils of this material having a resistance to displacement adapted to retain flat materials by their leading edge and allowing the highest flat material of the stack to be driven under the effect of said drive members.
  • the action of the fibrils of a material such as a velvet fabric makes it possible to obtain an adequate retaining effect and suitable for both thin or thick sheets or even envelopes, while conferring a very simple and a very low cost price.
  • the front wall of the store comprises an inclined plane with respect to a normal at the bottom, the fibrillary material being constituted by strips of velvet fixed on the inclined plane.
  • said strips are fixed in recesses of the inclined plane, the depth recesses being less than the length of the fibrils so that the latter protrude from the upper surface of the inclined plane in order to cooperate with the front edge of said flat materials.
  • the strips have a density of fibrils between 5,000 and 30,000 fibrils / cm2, preferably 18,000 fibrils / cm2, the length of the fibrils being between 0.7 and 3mm , preferably substantially equal to 1.5 mm, the fibrils exceeding by 0.2 to 1.5 mm the upper surface of the inclined plane, preferably by 0.5 mm.
  • the invention also aims to simplify and improve the selection of the highest sheet and the easy alignment of this sheet while keeping the construction of the device as simple as possible. It is characterized for this purpose by the fact that the drive members are constituted by at least one drive roller having on its periphery at least one first sector having a coefficient of friction high enough to drive the highest flat material of the pile towards the machine and at least a second sector having a coefficient of friction low enough to allow a sliding of the highest selected flat material between the drive roller and the underlying flat materials of the pile during an alignment phase .
  • This particular construction of the drive rollers allows an efficient selection of the highest sheet, while allowing the alignment of this sheet in a later phase without the need to move the drive rollers away from the selected sheet. and to provide for other alignment mechanisms or bodies.
  • the drive roller (s) further comprise a third sector, the outer surface of which is set back relative to the first and to the second sector so as to constitute a clearance for loading the stack of flat materials.
  • the drive roller or rollers are in the form of a cam having a central elastomer coating disposed between two identical side cams, the outer surface of the elastomer coating extending beyond the outer surface on the first sector of the roller.
  • lateral cams for driving the highest flat material the external surface of lateral cams projecting from the external surface of the elastomer coating on the second and third sector, the external surface of the lateral cams of the second sector being in contact with the flat material the higher and the external surface of the lateral cams of the third sector being closer to the axis of the drive shaft than the external surface of the second sector.
  • the invention also relates to an improvement of the support plate on which the flat materials to be introduced are arranged and it is characterized for this purpose by the fact that this support plate is subdivided, at least in its portion located opposite the rollers d 'drive, in three parts capable of being resiliently displaced with respect to each other, each of these parts being urged by an elastic element against a drive roller.
  • This arrangement makes it possible to compensate for defects in alignment of the drive rollers or in the flatness of the support plate.
  • the device also allows the reliable introduction of flat materials of different widths.
  • the support plate is pivotally articulated on the side walls of the magazine by means of two pivots engaged in longitudinal openings allowing a displacement of the pivots perpendicular to the axis of the pivots.
  • the invention also relates to a simplification and improvement of the drive mechanism for the drive shaft meshing via at least one intermediate pinion with a drive motor. It is characterized for this purpose by the fact that the drive mechanism comprises a clutch device comprising a notched pinion whose teeth have two notches, this notched pinion being capable of meshing with the intermediate pinion, said notches defining rest or stop positions when they are opposite the intermediate pinion.
  • the clutch device comprises at least one clutch and retaining lever capable of cooperating with rest or stop stops provided on the notched pinion, the device comprising a advancement mechanism having an advancing lever resiliently urged against a advancing cam so as to bring the clutch and retaining lever against resting or stopping stops, when said indentations of the indented pinion are opposite the intermediate pinion.
  • This construction ensures very reliable operation, while requiring a low number of components.
  • the device comprises a clutch control mechanism constituted by a helical spring carried by the intermediate pinion and having a free end capable of cooperating with the clutch and retaining lever during a reverse rotation of the drive motor. so as to release the clutch and retaining lever from one or the other of the rest or stop stops and so as to release the notched pinion so that the latter meshes with the intermediate pinion under the effect of the advancement mechanism.
  • a clutch control mechanism constituted by a helical spring carried by the intermediate pinion and having a free end capable of cooperating with the clutch and retaining lever during a reverse rotation of the drive motor. so as to release the clutch and retaining lever from one or the other of the rest or stop stops and so as to release the notched pinion so that the latter meshes with the intermediate pinion under the effect of the advancement mechanism.
  • the device comprises a control lever, a first part of which is arranged so as to cooperate with the free end of said spring, a second part of which is capable of cooperating with the clutch and retaining lever to move this the latter against the effect of an elastic element during a clutch control and a third part of which is capable of cooperating with portions of the notched pinion so as to brake the latter during a clutch control.
  • the scalloped pinion is integral with the drive shaft, the latter having come in one piece with at least one actuating cam arranged so as to push the sheet support plate against the effect of elements. elastic in the rest position, with said advancement cam, with at least part of the drive members and with guide elements for the sheets.
  • This construction allows very precise and inexpensive manufacture of the drive shaft and its associated elements, for example from injected plastic.
  • the present invention also relates to a method of actuating the insertion device and it is characterized for this purpose in that one loads in a position rest the stack of flat materials in the magazine, in that the drive shaft is engaged by reverse rotation of the drive motor, in that the support plate is biased towards the drive members, which , driven by rotation in front of the drive motor, drive by means of a first sector with a high coefficient of friction the highest flat material of the pile in the direction of said machine, in that an alignment of the sheet in a position for stopping the drive shaft by reverse rotation of the drive motor, the drive members braking by means of a second sector with a lower coefficient of friction than the first sector, said flat material, in that the support plate is moved away from the drive members to return to the rest position, the whole of this cycle being carried out on one revolution of the drive shaft.
  • This process allows very reliable selection and introduction of sheets while having a reduced number of successive operations.
  • the present invention also relates to an auxiliary umblefeuilles intended to serve as a support for flat materials protruding in length from the magazine and it is characterized in that this leaf support consists of a plate having an elongated slot, a retaining member engaged in the slot being integral with the rear wall of the bottom and comprising a head with a diameter larger than the width of the box, the rear wall having a projecting part along which the plate can be slid, the plate being shaped so that be able to be rotated by a predetermined angle around the retaining member to be moved from a retracted position to an active position and vice versa.
  • Figure 1 is a front view of the introducer and a portion of the printer on which the device is mounted.
  • FIGS. 2A, 2B and 2C represent cross-sectional views of the device according to the plane II-II of FIG. 1, in three positions: 2A in the rest position, 2B during the selection of the sheet, 2C during the sheet alignment.
  • Figures 3A, 3B and 3C show cross-sectional views of the device according to the plane III-III of Figure 1 in three positions: 3A in the rest position, 3B when selecting the sheet, 3C during alignment of the sheet.
  • FIG. 4 is a side view of the right face of the device of FIG. 1.
  • FIG. 5 is a view of a detail of FIG. 4.
  • Figure 6 is a plan view of the drive shaft.
  • Figure 7 is a view of the rear face of the device.
  • the introduction device 1 illustrated in FIG. 1 is removably mounted on a printer 2 of which only part of the frame 3, the transport rollers 4, the transport shaft 5 and the drive motor 58 are shown.
  • the device 1 may of course also be integral with the printer, a typewriter or any other device using flat materials, such as sheets of paper, card stock or envelopes.
  • the device 1 comprises a magazine 6 with a bottom 8 (fig. 2A), a front wall 9, two fixed side walls 10 and 11, and a support plate 12 on which a stack 14 of sheets, envelopes or all other flat materials may be available.
  • the support plate 12 is pivotally articulated on the side walls 10, 11 by means of two pivots 15 engaged in longitudinal openings 17 allowing an adjustment transverse to the axis of the pivots 15.
  • Three springs 16 bias the support plate 12 in the direction drive rollers 20 mounted on a drive shaft 23.
  • This support plate 12 comprises a movable lateral guide 25 for the sheets slidably mounted on the support plate 12 in a direction perpendicular to the direction of introduction of the sheets indicated by the arrow 26.
  • the guide 25 serves as lateral support allowing the adequate introduction of all flat materials, sheets or envelopes, of different dimensions.
  • the width of the introduction device can thus be adapted to different formats of flat materials to be introduced.
  • the support plate 12 is further subdivided in its lower half into three parts 27, 28, 29 separated by slots 30 and 31, each part being urged individually by one of the springs 16 in the direction of one of the drive rollers 20.
  • each part 27, 28, 29 can be moved relative to the neighboring parts.
  • the rear face of the bottom 8 of the magazine 6 is provided with a retractable auxiliary sheet support 34 intended to serve as support for the upper part of large sheets.
  • This leaf support 34 is in the form of an oblong plate 35 having at its free end an opening 36 for gripping.
  • a retaining element in the form of a button 37 secured to the rear face of the bottom 8 of the magazine is engaged in an elongated slot 38 of the plate 35. As the head of the button 37 has a diameter greater than the width of the slot 38, the plate 35 is retained against the rear face of the bottom 8, but can slide in a direction parallel to the slot 38 along a projecting part 40 provided on the rear face of the bottom 8.
  • the lateral edge 39 of the plate 35 is slid along the projecting part 40 to the left.
  • the button 37 has reached the right end of the slot, it suffices to turn the plate 35 90 ° upwards. In this position, the plate 35 rests by its lower edge 41 on the projecting part 40.
  • the lower edge 41 of the latter has a rounded angle 42 in a quarter-circle having its center combined with the center of the button 37.
  • the front wall 9 of the store has an inclined plane 45 making a predetermined angle ⁇ with a plane 46 parallel to the bottom of the bottom 8 of the store.
  • This angle is preferably chosen between 50 and 85 ° and very advantageously between 60 and 80 °. It is in the configuration illustrated in FIG. 2A equal to 71 °.
  • the inclination of this plane 45 relative to the rear part of the front wall 9 is therefore between 5 and 40 ° and is in Figure 2 equal to 19 °.
  • the inclined plane 45 comprises three recesses 47 in which are stuck three strips 48 of a fibrillated material, such as a fabric of the velvet type.
  • the depth of the recesses 47 is such that the upper part of the fibrils of the strips 48 appears above the upper surface of the inclined plane 45 so as to cooperate with the anterior edge of the sheets or flat materials to be introduced and to retain these materials, the anterior edge enters between the fibrils of the bands to constitute retainers.
  • These strips 48 have a resistance to movement of a sheet which is a function of the material of the fibrils used, their diameter, their length, their density and the depth of penetration of the front edge of the sheet. 5 mm wide strips with a density of 18,000 fibrils / cm2 and a length of 1.5 mm give an excellent retaining effect when these fibrils exceed the upper surface of the inclined plane by 0.5 mm 45.
  • the fibrillary strips 48 are embedded in the inclined plane 45 in positions located opposite the drive rollers 20.
  • the uppermost sheet of the stack is moved in emerging from the fibrils (FIG. 2B), while the following sheet and the others are retained in place by the fibrils of the strips 48 without it being necessary to provide lateral retaining corners, as is the case in the majority of known introducers.
  • the introduction device comprises a drive mechanism 50 very specific for the drive shaft 23.
  • This drive mechanism 50 includes a clutch control member 51 in connection with a clutch mechanism 52 associated with an anti-noise mechanism 53 and cooperating with a advancement mechanism 54.
  • the drive mechanism 50 is actuated by a pinion 57 integral with the transport shaft 5 of the printer and in engagement with a drive motor 58 of the printer. It is understood that the introduction device 1 could also be driven by a motor specific to the introduction device.
  • the pinion 57 is engaged with a first pinion 60 of the clutch control member 51.
  • This first pinion 60 is integral with a second pinion 61 capable of cooperating with the teeth of a notched pinion 62 integral with the end of the drive shaft 23.
  • This indented pinion 62 comprises two indented sectors 63 and 64 devoid of teeth. When one or other of these two sectors 63, 64 is opposite the second pinion 61, the drive shaft is not driven, but held in position by the retaining and clutch mechanism 52.
  • the indented pinion 62 comprises two openings 65 and 65a in the form of a segment of a circle arranged under the teeth and extending the indented sectors 63, 64 in the sinister direction in FIG. 4. These two openings 65 , 65a give the teeth under which they are located a radial elasticity allowing an easy gearing of the notched pinion 62 with the second pinion 61, even if two teeth of the teeth of these two pinions 61,62 are face to face during engagement notched pinion 62.
  • the retaining and clutch mechanism 52 comprises a first and a second lever 66,67 pivotally mounted on the magazine by means of a pivot 74.
  • the first lever 66 serves as a locking lever. It includes one end provided with a retaining tooth 68 intended to cooperate with two openings 69.70 provided in a cylindrical skirt 71 integral with the notched pinion 62.
  • This first lever 66 is biased by a spring 72 against this skirt 71 so that its retaining tooth 68 slides on the outer surface of the skirt 71 and enters one or other of the openings 69, 70 to stop the notched pinion 62 against edges 111 and 110 and hold it when one or more 'other of the two indented sectors 63,64 is located opposite the second pinion 61.
  • the first lever 66 is also in contact with a fixed stop 73 secured to the magazine 6.
  • the first lever 66 is controlled by the second lever 67 which includes a first end 75 cooperating with the clutch control member 51 and with a lateral extension 76 of the first lever 66 to move the latter against the action of the spring 72 and to release the retaining tooth 6 8 from one or other of the openings 69.70.
  • a second end 77 of the second lever 67 is intended to cooperate with two extensions 78, 79 of the skirt 71 of the notched pinion 62 so as to brake the latter. In the rest position, the second lever 67 is biased by an elastic curved part 80 against the fixed stop 73.
  • the clutch control member 51 is produced in the form of a clutch spring 92 wound on a shaft 93 secured to the pinions 60 and 61.
  • This spring 92 comprises at one of its ends a straight strand 94 intended to cooperate during a reverse rotation of the drive motor 58 with the first end 75 of the second lever 67 so that the latter acts on the first lever 66 to disengage the retaining tooth 68 from one or the other of the openings 69, 70 and to engage the drive of the drive shaft 23, when the first and second pinion 60,61 are rotated in a dextrous direction with reference to FIG. 4 corresponding to a reverse rotation of the drive motor 58.
  • the advancement mechanism 54 comprises a cam 85 integral with the drive shaft 23 and having two projecting sectors 86,87.
  • An advancement lever 88 is pivotally mounted on the magazine 6 and biased by a spring 89 against the cam 85.
  • the spring 89 is mounted between the free end of the advancement lever 88 and the magazine 6.
  • the cam 85 is arranged so as to urge the drive shaft 23 in rotation clockwise in FIG. 3A, when the drive shaft is in a position such that one or the other of the notched sectors 63,64 of the notched pinion 62 is opposite the second pinion 61 and that the notched pinion 62 is therefore not driven by the second pinion 61, but blocked by the locking lever 66.
  • the drive rollers 20 are cam-shaped and have three sectors.
  • a first sector 100 has a coefficient of friction high enough to effect separation and entrainment of the highest sheet of the stack of sheets, a second sector 101 with a coefficient of friction sufficiently low to allow the sliding of this sheet during an alignment phase when introduced into the printer and a third sector 102 providing a clearance for loading sheets.
  • the sector with a high coefficient of friction 100 is constituted by a central elastomer coating 109 applied to a support 105 bordered by two cams 103 made of plastic material with a lower coefficient of friction constituting the second and third sectors 101 and 102.
  • the outer surface of the elastomer coating 109 exceeds the cams 103 of plastic material over a sector substantially of 180 ° to come into contact with the highest sheet (FIG. 2B).
  • the cams 103 extend beyond the elastomeric coatings 109 to come into contact with the sheet.
  • the cams 103 are flattened to form said clearance and the elastomer coating 109 occupies a retracted position.
  • the drive shaft 23 also comprises six circular surfaces 104 with a radius equal to or less than the smallest radius of the drive rollers 20. These circular surfaces 104 are intended for guiding the sheets between the transport rollers.
  • the drive shaft 23 is made of injected plastic and comes in one piece with the cams 103, with the supports 105 (FIG. 2A) for the coating 109 of elastomer, with the six circular guide surfaces 104, with the two actuating cams 106 for pushing the support plate 12 and with the advancing cam 85 divided into two parallel cams.
  • This shaft 23 is guided in two bearings 108 (fig 1) of the magazine 6 and secured to the notched pinion 62.
  • the operation of the introduction device is as follows.
  • the actuating cam 106 cooperates with the support plate 12 to push it back.
  • a stack of sheets 14 can be loaded in the magazine 6.
  • the sheets are retained at their front edge by the fibrillating retaining strips 48.
  • the cams 103 with a low coefficient of friction of the drive rollers 20 are separated from the highest sheet.
  • the projecting sector 86 of the advancing cam 85 (FIG. 3A) cooperates with the advancing lever 88, which biases the drive shaft 23 in a dextrous direction of rotation.
  • the drive shaft 23 is however held stationary by the lever 66 ( Figures 4 and 5) whose tooth 68 is inserted into the opening 70 provided in the skirt 71.
  • the tooth 68 of the lever 66 actually abuts against the edge left 110 of this opening 70 and retains the drive shaft 23 against the action exerted by the advancing lever 88 on the advancing cam 85.
  • the first notch 63 of the notched pinion 62 is located at look of the second pinion 61.
  • the motor 58 of the printer is rotated in the opposite direction to the advancement of the paper.
  • the pinions 60 and 61 then rotate in a dextrous direction so that the rectilinear strand 94 of the clutch spring 92 (fig. 4) comes into contact with the end 75 of the lever 67.
  • the rectilinear strand moves the lever 67 according to a senestrial rotation around the pivot 74, and the lever 67 drives the lever 66 by means of the lateral extension 76 in its movement of senestrial rotation.
  • the tooth 68 of the lever 67 is thus released from the edge 110 of the opening 70 and the indented pinion 62 and the shaft 23 are set in dextral rotation under the effect of the advancing lever 88.
  • This rotation is slowed down because the second end 77 of the second lever 67 comes into contact with the extension 79 of the notched pinion 62, which allows a clutch and a braked and progressive engagement of the notched pinion 62 with the second pinion 61 avoiding the emission of noise.
  • the lever 67 cooperating by braking with the notched pinion 62 thus constitutes the noise reduction mechanism 53.
  • the meshing of the notched pinion 62 with the second pinion 61 is carried out adequately due to the radial elasticity of the teeth of the notched pinion in the vicinity of the clutch wheel thanks to the opening 65a provided under the teeth.
  • the motor 58 is then rotated in the direction of rotation corresponding to the advancement of the sheet transport.
  • the pinions 60 and 61 rotate in a senestral direction and the indented pinion 62 and the drive shaft in a dextral direction.
  • the actuating cam projections 106 are released from the support plate 12 and the stack of sheets 14 is applied by the springs 16 against the drive rollers 20.
  • the sector with a high coefficient of friction 100 of the elastomeric coating 109 comes into contact with the uppermost sheet of the stack 14 and releases this sheet from the retaining strips 48 with fibrils, while the other underlying sheets remain retained.
  • the selected sheet is then taken between the transport rollers 4 of the printer rotating in the direction of advancement of the sheet transport.
  • the sector 101 with a lower coefficient of function of the cams 103 comes into contact with the higher sheet which is then no longer advanced by the drive rollers 20 (fig. 2C).
  • the second indented sector 64 of the indented pinion 62 is located opposite the second pinion 61, while the projecting sector 87 of the advancing cam 85 cooperates with the advancement lever 88 for turning the drive shaft 23 in a dextrous direction in FIG. 3C.
  • the tooth 68 of the lever 66 enters under the effect of the spring 72 into the opening 69 of the skirt 71 of the indented pinion 62, so that the rotation of the indented pinion 62 is stopped since the tooth 68 comes into abutment against the edge 111 of the opening 69.
  • This transport behind the selected sheet is made possible by the low coefficient of friction of the sector 101 of the drive rollers 20.
  • the selected sheet is taken obliquely between the transport rollers 4 of the printer, it is aligned perfectly by the reverse transport movement.
  • the motor 58 is rotated in the direction of sheet transport, the drive shaft 23 is rotated dextrally.
  • the actuating cam 106 pushes the support plate 12 backwards to move the stack of sheets 14 away from the drive rollers 20, while the selected sheet is advanced by the transport rollers 4 of the 'printer.
  • the indented sector 63 of the indented wheel 62 comes opposite the second pinion 61 and the tooth 68 of the lever 66 falls under the effect of the spring 72 in the opening 70 of the skirt 71.
  • the drive shaft 23 is at this moment biased in dextral rotation by the action of the advancing lever 88 on the projecting sector 86 of the advancing cam 85 so that the tooth 68 of the lever 66 is urged against the edge 110 of the opening 70 of the skirt 71. This position therefore again corresponds to the initial rest position during which the printing of the selected sheet is carried out.
  • This construction of the introducer allows very reliable operation of the separation of the highest sheet, while comprising a small number of components, and can therefore be manufactured at a very low cost price.
  • the strips of fibrillated material 48 of the velvet type, give an excellent retaining effect to the sheets stacked in the magazine 6, while allowing easy separation of the highest sheet.
  • the drive rollers 20 with two coefficients of friction ensure reliable separation of the highest sheet and at the same time serve as guide elements during the alignment phase of the selected sheet.
  • the support plate 12 divided over a portion of its height into three parts 27, 28, 29 allows regular application of the sheets against the drive rollers 20 for any width of these sheets.
  • the introducer comprises only a single transverse shaft from one piece with the transport rollers 20, the actuating cams 106 for controlling the movement of the support plate 12 and the advancement cam 85 allowing the meshing of the device during clutching. Since this tree can be made of injectable plastic, the manufacture and assembly of this part is very easy and at a low cost price.
  • the notched pinion 62 associated with the two levers 66,67 allows due to its elaborate construction a control reliable of all the rotational movements of the drive shaft while giving the device silent operation.
  • the device also has a retractable sheet support 34 in a single piece and simple and safe operation, while being very low cost.
  • This construction also makes it possible to manufacture almost all the constituent elements by injection of plastic material, which makes possible a very low cost price.
  • the small number of these constituent elements ensures very rapid and uncomplicated assembly and repairs.
  • the embodiment described above has no limiting character and that it can receive any desirable modifications within the framework as defined by the independent claims.
  • the strips 48 may consist of any material having straight, curved fibrils, with hooks adapted to retain the sheets. The number and their dimensions can be chosen according to the applications of the introduction device.
  • the drive shaft could have a different number of drive rollers and the elastomer surfaces of these could be replaced by plastic surfaces having transverse ridges intended to entrain the sheet.
  • the clutch of the drive shaft could be constituted by any other mechanical or electrical element, for example by means of an electromagnet.
  • the support plate 12 instead of being subdivided into three parts could include another number of parts capable of being displaced with respect to each other.
  • the sheet feeder could of course be used for any machine using flat materials, such as printers, typewriters, copiers, scanners, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP96104381A 1995-07-10 1996-03-20 Vorrichtung zum Zuführen von flachen Materialien Expired - Lifetime EP0753475B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2000/95 1995-07-10
CH200095 1995-07-10
CH02000/95A CH690853A5 (fr) 1995-07-10 1995-07-10 Dispositif d'introduction de matériaux plats.

Publications (3)

Publication Number Publication Date
EP0753475A2 true EP0753475A2 (de) 1997-01-15
EP0753475A3 EP0753475A3 (de) 1998-01-14
EP0753475B1 EP0753475B1 (de) 2001-12-19

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Application Number Title Priority Date Filing Date
EP96104381A Expired - Lifetime EP0753475B1 (de) 1995-07-10 1996-03-20 Vorrichtung zum Zuführen von flachen Materialien

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US (1) US5711519A (de)
EP (1) EP0753475B1 (de)
CH (1) CH690853A5 (de)
DE (1) DE69618095T2 (de)

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EP0753475B1 (de) 2001-12-19
CH690853A5 (fr) 2001-02-15
DE69618095D1 (de) 2002-01-31
DE69618095T2 (de) 2002-07-11
US5711519A (en) 1998-01-27

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