US3871641A - Sheet feeding device - Google Patents

Sheet feeding device Download PDF

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Publication number
US3871641A
US3871641A US324234A US32423473A US3871641A US 3871641 A US3871641 A US 3871641A US 324234 A US324234 A US 324234A US 32423473 A US32423473 A US 32423473A US 3871641 A US3871641 A US 3871641A
Authority
US
United States
Prior art keywords
sheet
sheets
telescopic rod
stack
transporting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US324234A
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English (en)
Inventor
Gerhard Marx
Gunter Kramer
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.)
Kalle GmbH and Co KG
Original Assignee
Kalle GmbH and Co KG
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 Kalle GmbH and Co KG filed Critical Kalle GmbH and Co KG
Application granted granted Critical
Publication of US3871641A publication Critical patent/US3871641A/en
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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/26—Supports or magazines for piles from which articles are to be separated with auxiliary supports to facilitate introduction or renewal of the pile
    • B65H1/266—Support fully or partially removable from the handling machine, e.g. cassette, drawer
    • 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
    • B65H1/04—Supports or magazines for piles from which articles are to be separated adapted to support articles substantially horizontally, e.g. for separation from top of pile
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/11—Parts and details thereof
    • B65H2405/113—Front, i.e. portion adjacent to the feeding / delivering side
    • B65H2405/1136—Front, i.e. portion adjacent to the feeding / delivering side inclined, i.e. forming an angle different from 90 with the bottom

Definitions

  • ABSTRACT A device for feeding individual sheets of a stack to apparatus in which these sheets are to be processed further, which comprises a sheet transporting element having a plane underside of non-slippery material which may be brought into contact with the upper most sheet of the stack, said sheet transporting element being provided with means for moving it backwards and forwards in the direction of transportation of the sheets.
  • the present invention relates to a device for feeding individual sheets of a stack to an apparatus in which the sheets are processed further, for example a copying apparatus.
  • the apparatus should have a high degree of reliability that several sheets will not be fed simultaneously, and should at the same time be rapidly and reliably utilisable.
  • the present invention accordingly provides a device for feeding individual sheets of a stack to apparatus in which these sheets are to be processed further, especially an electrophotographic copying machine, which comprises a sheet transporting element having a plane underside of non-slippery material, preferably nonslippery foam material, which may be brought into contact with the uppermost sheet of the stack, said sheet transporting element being provided with means, preferably comprising at least one telescopic rod system for moving it backwards and forwards in the direction of the transportation of the sheets.
  • an electrophotographic copying machine which comprises a sheet transporting element having a plane underside of non-slippery material, preferably nonslippery foam material, which may be brought into contact with the uppermost sheet of the stack, said sheet transporting element being provided with means, preferably comprising at least one telescopic rod system for moving it backwards and forwards in the direction of the transportation of the sheets.
  • the means for moving the sheet transporting element preferably comprises at least one telescopic rod system running downwards at an angle and backwards through the sheet transporting element, relative to the sheet transporting direction.
  • the present invention also provides a process for supplying individual sheets from a stack to apparatus in which the sheets are to be further processed, especially an electrophotographic copying machine, using the device of the invention. n displacing the telescopic rod system in the sheet transporting direction, the telescopic rod system is self'locking to prevent telescoping, and hence the uppermost sheet is shifted relative to the stack, whilst during the return movement the telescopic rod system is slightly telescoped and, as a result of the inclined position, as in the case of a sloping plane, the non-slippery transporting element is lifted off the uppermost sheet of the stack of sheets and hence the paper is not buckled but remains lying flat.
  • This device is of extremely simple construction and permits rapid and reliable feeding, especially of zinc oxide copying papers to an electrophotographic reproduction apparatus.
  • the angle between the telescopic rod system and the normal to the paper should preferably be in the range of from 5 to an angle of about l3 between the telescopic rod system and the normal to the paper (or of 77' between the telescopic rod system and the paper surface) has proved particularly satisfactory.
  • the transporting element can be arranged particularly simply to be displaceable in the device by providing, in the lid above the stack, a slit in which a slider is displaceably mounted, the end of the telescopic rod system being fixed thereto.
  • the slope of the telescopic rod system is of decisive importance and is always kept constant whilst the complete stack is being fed, since the telescopic rod system is not arranged so that it can be tilted.
  • the transporting element nevertheless remains in engagement with the sheet of the copying stack which is uppermost at any time, since the telescopic rod system is automatically extended as the stack height decreases.
  • the device of the invention preferably comprises a box to hold the stack of sheets, wherein the front transverse wall, that is the wall transverse to the sheet transporting direction towards which the sheets are to be transported, slopes outwards from the bottom of the box.
  • the front transverse wall thus acts as a ramp for the sheets to be transported.
  • the rear transverse wall is also sloped and parallel to the front transverse wall.
  • the two sloping transverse defining walls also always cause a little fanning of the papers on insertion into the sheet stacking device. This permits air to penetrate between the individual sheets and thereby enables them to be drawn off more readily.
  • the front sloping transverse wall possesses at least one strip, having a rough surface, running in the sheet transporting direction.
  • the front edge of the sheet flicks along this strip and a further sheet which may have been fed with it is retained by the roughness.
  • the rough strip on the front transverse defining wall is somewhat broader at the bottom than at the top, that is to say if it tapers conically. This permits very reliable feeding of single sheets particularly also for the bottom sheets of a stack of sheets.
  • the strip having a rough surface can be formed particularly simply by a glued-on fabric strip of not excessively rough structure.
  • the sheet stack is located in an insulated housing and the outlet edge of this housing, that is to say, for example, the upper edge of the front sloping transverse defining wall, is electrically conducting and exposed so that it comes into contact with the fed sheet and thus prevents the charge emanating from the corona from being conducted into the stack of sheets.
  • a return spring is provided in the device, between the housing and the transporting element displaceable therein, this spring being tensioned when transporting the sheet and being capable of retracting the transporting element thereafter to its starting position.
  • a micro-switch in the device in such a way that on displacing the transporting element from the starting position the switching of the micro-switch causes the various subsequent stations of an apparatus in which further processing of the sheets is to occur, for example an electrophotographic apparatus, to be switched on.
  • the transporting element may suitably comprise a foam block to the top of which is fixed a metal plate, the telescopic rod system being fixed at an angle on to this metal plate.
  • This construction is particularly spacesaving if the outer sheath of the telescopic rod system is located in an appropriately shaped sloping bore of the foam block, the metal plate is bored and is connected to the extending end of the sheath. The inner rod of the telescopic rod system can then be drawn out but the requisite height of the construction is kept low due to the fact that the length of the telescoped telescopic rod system and the thickness of the foam block are not additive.
  • FIG. 1 represents an enlarged vertical section along the line ll of FIG. 2,
  • FIG. 2 represents a plan view of a device according to the invention, with the lid 12 omitted, and
  • FIG. 3 represents a detail of the device shown in FIG. 1, taken along the line III-11] of FIG. I.
  • An angled metal sheet 2 is located in a housing 1.
  • This sheet 2 has a bottom section 2a and two sloping sections 2b and 2c which are parallel to one another.
  • the two sloping sections 2b and 2c of the sheet 2 represent the sloping transverse defining walls for a stack of sheets 17 consisting of sheets of zinc oxide paper.
  • a removable cover plate 12 and a guide sheet 3 are provided.
  • the guide sheet 3 causes the paper sheet which has been pushed forward to be moved in the direction of guiding elements which are not shown, for example transporting belts of an electrophctographic copying apparatus.
  • the stack of sheets 17 is held by two guide sheets 4 and 5 which are internally lined with felt-like or velvet-like fabric 413 and 5B.
  • one guide sheet 5 is lightly pressed against the stack 17 by means of a spring 13 or a foam slab.
  • a foam block 6 of soft porous foam rests on the uppermost sheet of the stack of sheets 17.
  • a block of "Moltopren (Trade Mark, product of Beiersdorf A.G., Hamburg, Germany) or similar material has proved very successful.
  • a metal plate 18 is fixed to this block.
  • the block 6 possesses a sloping bore in which is located the outer sheath ofa telescopic rod system 7. This sheath is soldered to the plate 18 in the desired sloping position, as is indicated schematically by the soldering point 19.
  • the extensible rod of the telescopic rod system 7 is connected at its end to an angled metal sheet 8, which in turn is connected to a handle 10.
  • the handle with the metal sheet 8 located below it and the telescopic rod system fixed thereto, as well as the Moltopren block 6, can be pushed to and fro in a slit in the lid 12.
  • the paper transporting direction is here indicated by the arrow 20.
  • a normal force N is produced between the two components of the telescopic rod system 7, which acts at right angles to the direction in which the telescopic rod is guided.
  • this normal force N is substantially directed towards the lower left-hand corner.
  • a normal force N is produced which is directed toward the right top corner, as shown in the right-hand triangle of forces.
  • This normal force is composed of a frictional force R, and a vertical force V Due to this vertical component V the foam block has a tendency to climb along the telescopic rod 7, and the top sheet of the stack of sheets is thus relieved.
  • This relief is only effective as long as there is at least a slight contact (friction) between the foam block 6 and the uppermost sheet of the stack.
  • the foam block 6 it is also possible, and comes within the scope of the present invention, for the foam block 6 to be in lateral contact with the felt-or velvet-covered guides 48 and 5B, in which case it could be completely lifted from the stack of sheets.
  • the first-mentioned embodiment is preferred, however, since it is not necessarily desirable that the foam block 6 is completely lifted, because a residual friction, which may even cause a slight displacement of the following sheet, facilitates the separation of the next sheet from the stack.
  • a return spring 14 is mounted between the edge of the lid l2 and the angled metal sheet 8. When the handle 10 is moved in the direction of the arrow 20, this spring is tensioned and automatically pulls the foam block 6 back to its starting position when the top sheet has been pushed forward.
  • a micro switch ll is located in the device in such a way that the movement of the handle 10 switches on, for example, the corona discharge device and the further transport devices of an electrophotographic apparatus.
  • Two narrow fabric strips 15 are glued onto the base 2a and the front sloping transverse defining wall 2b. These fabric strips, consisting of a fabric which is not excessively coarse (the self-adhesive *Leukoplast" tape manufactured for medical purposes by Messrs. Beiersdorf A.G., Hamburg, has proved successful) terminate just before the upper edge 3A of the sloping transverse defining wall 212. Furthermore, the base sheet of metal 2 is electrically insulated from the paper stack by means of thin insulating strips 16 (about 20 a thick).
  • the exposed electrically conducting edge 3A past which the zinc oxide paper is pushed, prevents charge from flowing back from the immediately following corona discharge device via the transported sheet into the stack of paper.
  • a stack of paper of size DIN A4 was transversely used.
  • Four telescopic rod systems 7 were provided on the angled metal sheet 8.
  • the extension length of the telescopic rod systems 7 depends on the number of sheets which are supposed to be in the stack. The process was successfully carried out with a stack of 250 sheets. It was found, surprisingly, that no traces of the sheet feed mechanism were to be found on the otherwise very sensitive zinc oxide paper. After having been used to transport several thousand sheets, no wear effect was as yet detectable on the Moltopren block 6.
  • An apparatus for feeding individual sheets of a stack to a device on which said sheets are further worked comprising a reciprocating conveyor element for the displacement of the top sheet of the stack and a reciprocating telescopic rod comprising a rod and sheath.
  • said conveyor element having a flat bottom of gripping foam which contacts the top sheet of the stack, said telescopic rod being arranged to extend obliquely downwardly and rearwardly with respect to the sheet-co nveying direction and having its sheath fastened to the conveyor element.
  • a device as claimed in claim 1 wherein the angle between the telescopic rod system and the normal to the paper is between 5 and 3.
  • a device as claimed in claim 1 including a lid positioned above the stack, and provided with a slit in which a slider is displaceably mounted in the slit, one end of the telescopic rod being angularly attached to the sider.
  • the device as claimed in claim 1 including a box having a front wall transverse to the sheet transporting direction, facing towards the direction to which the sheets are to be transported and sloping outwardly from the bottom of the box.
  • the device as claimed in claim 1 including an insulated housing defining an outlet edge for said sheets which is electrically conducting and so disposed that each sheet comes in contact therewith as it leaves the housing.
  • the electrically conducting outlet edge comprises the upper edge of the sloping front transverse wall.
  • the device as claimed in claim 4 including a spring interconnecting the slider and housing such that said spring is tensioned when transporting a sheet and then retracts the transporting element to its starting position.
  • the device as claimed in claim 13 including a microswitch which can be operated by the displacement of the sheet transporting element, said rnicroswitch being connectable to apparatus in which further pro cessing of the sheets is to occur such as to actuate this further processing apparatus when the displacement of the sheet transporting element occurs.
  • the sheet transporting element comprises a foam block to the top of which is fixed a metal plate, the telescopic rod being fixed at an angle onto this metal plate, and the metal plate being bored and connected to the extending end of the sheath of the telescopic rod.
  • the device as claimed in claim 1 for transporting sheets comprising four telescopic rods arranged transversely to the sheet transporting direction and equidistant from one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Paper Feeding For Electrophotography (AREA)
US324234A 1972-01-17 1973-01-16 Sheet feeding device Expired - Lifetime US3871641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2202024A DE2202024C3 (de) 1972-01-17 1972-01-17 Blattzufuhrvorrichtung

Publications (1)

Publication Number Publication Date
US3871641A true US3871641A (en) 1975-03-18

Family

ID=5833182

Family Applications (1)

Application Number Title Priority Date Filing Date
US324234A Expired - Lifetime US3871641A (en) 1972-01-17 1973-01-16 Sheet feeding device

Country Status (7)

Country Link
US (1) US3871641A (enrdf_load_stackoverflow)
JP (1) JPS5424191B2 (enrdf_load_stackoverflow)
AU (1) AU474804B2 (enrdf_load_stackoverflow)
DE (1) DE2202024C3 (enrdf_load_stackoverflow)
FR (1) FR2168795A5 (enrdf_load_stackoverflow)
GB (1) GB1391571A (enrdf_load_stackoverflow)
NL (1) NL7202557A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143981A (en) * 1976-08-06 1979-03-13 Pitney-Bowes, Inc. Unit document feeding mechanism
US4214673A (en) * 1978-06-19 1980-07-29 Olman Heath Company Cup-shaped coffee filter dispenser
US4629092A (en) * 1984-09-19 1986-12-16 English Franklin W Coffee filter dispenser
US4732255A (en) * 1986-02-18 1988-03-22 Bullard Wade A Dispensing apparatus
US4940506A (en) * 1989-02-13 1990-07-10 Mei Services, Inc. Device for use with self-adhesive removable labels
US5660384A (en) * 1994-11-23 1997-08-26 Minnesota Mining And Manufacturing Company Imaging unit container having shiftable walls
US5895040A (en) * 1997-06-20 1999-04-20 Lexmark International, Inc. Sheet separator
US6139007A (en) * 1999-10-22 2000-10-31 Lexmark International, Inc. Sheet separator dam with buckling element
US6213460B1 (en) 1999-11-11 2001-04-10 Lexmark International, Inc. Label support
US6279897B1 (en) 1999-08-30 2001-08-28 Lexmark International, Inc. Sheet separator dam
US6345921B1 (en) * 2000-12-08 2002-02-12 Hewlett-Packard Company Sheet feeding apparatus employing air streams as handling media
US6716254B2 (en) * 2000-12-07 2004-04-06 Brother Kogyo Kabushiki Kaisha Mechanism that separates a top sheet from sheets stacked on a hopper
US20060180993A1 (en) * 2004-12-29 2006-08-17 Samsung Electronics Co., Ltd. Print paper separating apparatus and method thereof
CN110696435A (zh) * 2019-11-28 2020-01-17 超然塑胶包装制品（深圳）有限公司 一种用于将手袋提条安装手袋的新型装置及其工作方法
US20220234813A1 (en) * 2022-04-11 2022-07-28 Main St. Group Sprung dispensing tower with resiliently compressible slide guide

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774340U (enrdf_load_stackoverflow) * 1980-10-20 1982-05-08
CA1223287A (en) * 1983-04-20 1987-06-23 R. Clark Dubois Large capacity paper tray and feeder for photocopy machine
US4674735A (en) * 1983-12-07 1987-06-23 R. Clark DuBois Automatic sheet feeder for copiers and other machines having sheet transport mechanisms and assemblies therewith
US4848762A (en) * 1988-03-16 1989-07-18 The Mead Corporation Sheet feeder with articulated feed pads
DE102016117238A1 (de) 2016-09-14 2018-03-15 Manroland Web Systems Gmbh Bremselement mit Besatz

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US747344A (en) * 1902-10-23 1903-12-22 Improvements Mfg Company Paper holding and feeding device.
US2086138A (en) * 1936-02-08 1937-07-06 Fred M Roque Paper feeding device
US2883190A (en) * 1957-07-11 1959-04-21 Central States Paper & Bag Co Sheet handling units
US3269590A (en) * 1964-12-03 1966-08-30 William W Harter Paper dispenser with pusher feet
US3306491A (en) * 1964-10-14 1967-02-28 American Photocopy Equip Co Apparatus and structure for handling copy paper
US3421753A (en) * 1967-07-11 1969-01-14 Recognition Equipment Inc Vacuum operated document feeder system
US3640524A (en) * 1969-06-30 1972-02-08 Bell & Howell Co Sheet-separating apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US747344A (en) * 1902-10-23 1903-12-22 Improvements Mfg Company Paper holding and feeding device.
US2086138A (en) * 1936-02-08 1937-07-06 Fred M Roque Paper feeding device
US2883190A (en) * 1957-07-11 1959-04-21 Central States Paper & Bag Co Sheet handling units
US3306491A (en) * 1964-10-14 1967-02-28 American Photocopy Equip Co Apparatus and structure for handling copy paper
US3269590A (en) * 1964-12-03 1966-08-30 William W Harter Paper dispenser with pusher feet
US3421753A (en) * 1967-07-11 1969-01-14 Recognition Equipment Inc Vacuum operated document feeder system
US3640524A (en) * 1969-06-30 1972-02-08 Bell & Howell Co Sheet-separating apparatus

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143981A (en) * 1976-08-06 1979-03-13 Pitney-Bowes, Inc. Unit document feeding mechanism
US4214673A (en) * 1978-06-19 1980-07-29 Olman Heath Company Cup-shaped coffee filter dispenser
US4629092A (en) * 1984-09-19 1986-12-16 English Franklin W Coffee filter dispenser
US4732255A (en) * 1986-02-18 1988-03-22 Bullard Wade A Dispensing apparatus
US4940506A (en) * 1989-02-13 1990-07-10 Mei Services, Inc. Device for use with self-adhesive removable labels
US5660384A (en) * 1994-11-23 1997-08-26 Minnesota Mining And Manufacturing Company Imaging unit container having shiftable walls
CN1086672C (zh) * 1997-06-20 2002-06-26 莱克斯马克国际公司 薄片分送器
US5895040A (en) * 1997-06-20 1999-04-20 Lexmark International, Inc. Sheet separator
US6279897B1 (en) 1999-08-30 2001-08-28 Lexmark International, Inc. Sheet separator dam
US6139007A (en) * 1999-10-22 2000-10-31 Lexmark International, Inc. Sheet separator dam with buckling element
US6213460B1 (en) 1999-11-11 2001-04-10 Lexmark International, Inc. Label support
US6716254B2 (en) * 2000-12-07 2004-04-06 Brother Kogyo Kabushiki Kaisha Mechanism that separates a top sheet from sheets stacked on a hopper
US6345921B1 (en) * 2000-12-08 2002-02-12 Hewlett-Packard Company Sheet feeding apparatus employing air streams as handling media
US20060180993A1 (en) * 2004-12-29 2006-08-17 Samsung Electronics Co., Ltd. Print paper separating apparatus and method thereof
CN110696435A (zh) * 2019-11-28 2020-01-17 超然塑胶包装制品（深圳）有限公司 一种用于将手袋提条安装手袋的新型装置及其工作方法
US20220234813A1 (en) * 2022-04-11 2022-07-28 Main St. Group Sprung dispensing tower with resiliently compressible slide guide
US11945642B2 (en) * 2022-04-11 2024-04-02 Main St. Group Sprung dispensing tower with resiliently compressible slide guide

Also Published As

Publication number Publication date
DE2202024A1 (de) 1973-07-26
DE2202024C3 (de) 1979-11-22
DE2202024B2 (de) 1979-03-22
AU474804B2 (en) 1976-08-05
JPS5424191B2 (enrdf_load_stackoverflow) 1979-08-18
NL7202557A (enrdf_load_stackoverflow) 1973-07-19
FR2168795A5 (enrdf_load_stackoverflow) 1973-08-31
AU5111473A (en) 1974-07-18
JPS4882830A (enrdf_load_stackoverflow) 1973-11-06
GB1391571A (en) 1975-04-23

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