WO2001068494A1 - New feeder and retard rollers and method of maximizing lifetime of rollers - Google Patents
New feeder and retard rollers and method of maximizing lifetime of rollers Download PDFInfo
- Publication number
- WO2001068494A1 WO2001068494A1 PCT/US2001/008000 US0108000W WO0168494A1 WO 2001068494 A1 WO2001068494 A1 WO 2001068494A1 US 0108000 W US0108000 W US 0108000W WO 0168494 A1 WO0168494 A1 WO 0168494A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- cof
- feed roller
- rollers
- release layer
- Prior art date
Links
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
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/52—Friction retainers acting on under or rear side of article being separated
- B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
- B65H3/5253—Driven retainers, i.e. the motion thereof being provided by a dedicated drive the retainers positioned under articles separated from the top of the pile
- B65H3/5261—Retainers of the roller type, e.g. rollers
-
- 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
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/53—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties
- B65H2404/531—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties particular coefficient of friction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/55—Built-up surface, e.g. arrangement for attaching the surface to the forwarding or guiding element
- B65H2404/551—Non permanent attachment, i.e. allowing interchange ability of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/56—Flexible surface
- B65H2404/563—Elastic, supple built-up surface
Definitions
- the present invention relates generally to sheet feeding apparatuses, and specifically to feed rollers and retard rollers with a wearable release outer layer and their use. It is further directed to a method testing these rollers and increasing the longevity of the rollers.
- the present invention relates generally to scuff feeds for transporting sheets from a sheet stack, and more particularly, to a scuff feed having an outer layer that does not retain contaminants and wears slowly.
- a latent image of information to be reproduced is formed on a uniformly charged dielectric member, altering the charge in an image- ise pattern.
- the latent image charge pattern is then developed with pigmented marking particles.
- the developed image is transferred to a receiver member and fixed to the receiver member by application of heat and/or pressure to form the desired reproduction.
- sheet- feeding systems for reproduction devices have been developed. Several processes are known for separating sheets of paper to be loaded. Common feeding processes consist of using a combination of rollers that feed sheets of paper into the reproduction apparatus.
- Paper separating mechanisms that use a friction retard systems include at least one paper feed roller and one retard member, which may be either a fixedly secured pad or a retard roller. Many apparatuses use the latter.
- both the feed roller and the retard roller are made of rubber or similar material in order that these rollers may have appropriate coefficients of friction (COFs) relative to paper
- the feed roller an the retard roller each comprise a core and an outer "tire.”
- the tire is a hollow cylindrical tube surrounding the core.
- the tires are placed ' around shafts that rotate. Sometimes an adhesive is used to hold the tire in place. During the feeding process a tire that is not secured may not rotate with the shaft. This will lead to either a nonfeed or double feed situation.
- One problem with current feed and retard rollers is the short useful lifespan of many of them. It is desirable to use tire materials that have a long lifetime and a resistance to surface contamination. Many materials will absorb oils or pick up contaminants that may be on the substrate being fed into the reproduction apparatus. The oil and contaminants may decrease the lifetime of the roller. Contamination also decreases the COF of the roller, increasing the chances of the device not properly feeding sheets into the copier.
- a second problem with current rollers is that the outer layer of feed rollers and the retard rollers usually have to be made out of different materials. This is undesirable since it also means different wear rates and different amounts of surface contamination. Summary of the Invention An object of the invention was to create a sheet feeding apparatus that uses at least one feed roller having a much longer lifetime than current rollers.
- a second object of the invention was to create a sheet feeding apparatus that uses at least one feed roller that resists contamination better than current feed rollers.
- a third object of this invention is to demonstrate the proper way to choose the COF, nip pressure, and retard roller braking force, to achieve a maximum lifetime in systems that use a feed roller and a retard roller.
- the invention is a sheet feeding apparatus comprising a feed roller and a retard roller.
- the rollers have an outer layer that is a material that wears at a rate sufficient to drastically reduce the amount of contaminants that collect on the feed roller.
- the reduction in contaminants reduces the loss of COF of the rollers.
- the new improved rollers operate for much longer periods without misfeeds. Experimental evidence has demonstrated lifetimes of up to four times that of previous surface materials.
- the present invention also includes novel ways of testing the new rollers as traditional testing methods were deemed inadequate, especially with regard to the wear rate and COF of the rollers.
- the present invention also shows a method of exploiting a relationship among the COF, the nip pressure, and the retard roller braking force.
- FIG. 1 is an illustration of a typical sheet feeding apparatus.
- Figure 3 is an illustration of the wear testing apparatus.
- the invention is a sheet feeding apparatus comprising a feed roller 2 a retard roller 4, and a nudging roller 6, as seen in Figure 1. More specifically, the invention is the use of a new outer material for the rollers involved in feeding paper into a reproduction apparatus. This new surface material gives the present feeding apparatus rollers a much longer lifetime than prior rollers. It also gives the rollers self-cleaning properties. In several tests that were conducted, the wear of the release layer was not measurable.
- copier is used to mean any reproduction apparatus, be it copier, printer, facsimiles, scanners, etc.
- references to the COF of a material usually mean its "working" COF.
- a roller When a roller is first manufactured its surface has a particular COF. This drops very quickly (within tens of sheets) to a working COF value.
- COF as used throughout the application refers to the • working COF.
- lifetime of the roller refers to its usable lifetime. When a roller becomes unusable depends upon a number of factors. These include how the roller wears (whether it wears evenly or not or how fast it wears), the tolerance of the device incorporating the roller to wear of the roller, whether the hardness of the roller changes with use, and how much the COF changes with use. Part of the appeal of the present rollers is their long usable lifetime.
- the feed roller 2, the retard roller 4, and the nudging roller 6 are each comprised of a core (or shaft) 8 and an outer tire 10.
- the tire is a hollow cylindrical tube surrounding the core. It is usually premolded before being placed around the shaft. The tire fits snugly around the core.
- the nudging roller 6 contacts the top sheet of a stack of sheets at 12 and pushes the top sheet into the nip 14 between the feed roller 2 and the retard roller 4.
- the retard roller 4 is connected to a clutch 16.
- a chain drive 18 causes the shaft 8 of the feed roller to rotate in cooperation with the nudging roller 6.
- the rotation of the feed roller 2 causes the retard roller 4, whose surface contacts that of the feed roller, to rotate.
- the clutch 16 prevents the retard roller from rotating evenly with the feed roller. This is necessary to prevent misfeed situations. As will be discussed in more detail below, setting this braking force that the clutch applies properly is an integral part of this invention.
- the tire for all three rollers is composed of a trade secret protected compound referred to as 35-28092-N-GY-A.
- This material is produced by Illbruck Office Products, 115 Canal Landing Boulevard, Rochester, NY 14626. Nippon Zeen Co. Ltd., Furukawa-Sogo Bldg., 2-6-1 Marunouchi, Chiyoda- Ku, Tokyo, Japan also produces this material.
- 35-28092-N- GY-A in a claim includes any substance that is chemically similar to or obvious from the makeup of 35-28092-N-GY-A.
- the material works best generally if it has a hardness of between 20 and 45 JISA and a working COF greater than 1.6.
- a feed roller or a retard roller that experiences a decrease in COF is more likely to misfeed. If the surface of the feed roller experiences a decrease in its COF, the rollers may fail to pull a sheet into the printer, resulting in a "nonfeed” situation. If the surface of the retard roller experiences a decrease in its COF, the rollers may pull two or more sheets into the printer, resulting in a "double feed” situation.
- a motor 30 drives a rotating shaft 32.
- the shaft consists of a hub 34 with a tire 36 surrounding it. Resting on top of the shaft is a bearing wheel 38. The center of the bearing wheel is offset 0.02" horizontally from the center axis of the shaft 32.
- a rod 40 connects the bearing wheel to an axis 42. The rod 40 pivots about the axis 42. Between the bearing wheel and the pivot point is located an adjustable weight 49. This weight is used to control the amount of force that the bearing wheel exerts on the shaft, i.e., it controls the nip pressure between them.
- a motor 48 pulls sheet of paper 44 through the nip between the bearing wheel and shaft.
- a scale 46 measures the force required to pull the paper through the nip.
- a COF for the tire is calculated from these force measurements. This measurement process is repeated 4000 times within one revolution of the tire 36, and the data bits are averaged and recorded along with the standard deviation.
- 35-28092-N-GY-A gives the rollers a renewing surface. Even after many thousands of feeds, the surface of the tire remains substantially free from contaminants.
- the rollers of the current invention last much longer than prior art rollers. This is part of what makes 35-28092-N-GY-A a superior surface layer for a roller.
- the primary advantage to rollers made with 35-28092-N-GY-A is the very long life they have in some printers when operating under certain conditions. These rollers have been tested in the field on various black and white and color printers for Xerox. All these tests returned great results as long as the machines were operated within certain predefined parameters. They have worked for hundreds of thousands of copies and not been noticeably worn.
- the wear testing apparatus is illustrated in Figure 3. This test will be referred to hereinafter as the Illbruck wear test.
- a motor 50 drives a belt 52 that turns a shaft 54. The speed of rotation can be adjusted depending on the tire being tested.
- the tire 56 to be tested is placed around the shaft.
- a block of maple wood 58 can be moved into contact with the tire 56.
- the wood block 58 is connected to a pivotable arm.
- An adjustable weight 60 is secured between the pivot point 62 of the arm and the wood block 58. The position and mass of the adjustable weight 60 determine how much force the wood block places on the tire. On this equipment it was determined that each hour of wear was equivalent to
- NP represents the nip pressure between the two rollers
- F BF represents the braking force on the surface of the retard roller
- nip pressure has been used here and throughout this description, as synonymous with the normal force between the rollers. While it is true that force and pressure are not the same thing, this is the convention in the art.
- 35-28092-N-GY-A in other types of copiers would work just as well.
- Some copier feeding mechanisms consist of a feed roller and a mat. The COF and nip pressure are set so that the feed roller only grabs one sheet at a time. It is believed that the use of
- 35-28092-N-GY-A for the outer layer of the roller will greatly increase the lifetime of these devices.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001243613A AU2001243613A1 (en) | 2000-03-14 | 2001-03-13 | New feeder and retard rollers and method of maximizing lifetime of rollers |
DE10195917T DE10195917T1 (en) | 2000-03-14 | 2001-03-13 | New feed and retard rollers, and methods to maximize the life of the rollers |
JP2001567007A JP3934421B2 (en) | 2000-03-14 | 2001-03-13 | Novel feeding and braking roller and method for maximizing roller life |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/524,962 US6581925B1 (en) | 2000-03-14 | 2000-03-14 | Feeder and retard rollers, and method of maximizing lifetime of rollers |
US09/524,962 | 2000-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001068494A1 true WO2001068494A1 (en) | 2001-09-20 |
Family
ID=24091358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/008000 WO2001068494A1 (en) | 2000-03-14 | 2001-03-13 | New feeder and retard rollers and method of maximizing lifetime of rollers |
Country Status (5)
Country | Link |
---|---|
US (1) | US6581925B1 (en) |
JP (1) | JP3934421B2 (en) |
AU (1) | AU2001243613A1 (en) |
DE (1) | DE10195917T1 (en) |
WO (1) | WO2001068494A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3710430B2 (en) * | 2002-04-05 | 2005-10-26 | キヤノン株式会社 | Sheet material feeding apparatus and image forming apparatus |
US7406276B2 (en) * | 2004-06-30 | 2008-07-29 | Oki Data Corporation | Contact pressure setting method and image forming apparatus |
JP5116544B2 (en) * | 2008-04-14 | 2013-01-09 | キヤノン株式会社 | Image forming apparatus |
KR101850276B1 (en) * | 2012-01-03 | 2018-04-19 | 에스프린팅솔루션 주식회사 | Paper-feeding apparatus and image forming apparatus adopting the same |
JP7352157B2 (en) * | 2019-09-27 | 2023-09-28 | セイコーエプソン株式会社 | Image reading device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4030722A (en) * | 1975-05-13 | 1977-06-21 | Pitney-Bowes, Inc. | Sheet-material separator and feeder system |
US5271615A (en) * | 1981-08-21 | 1993-12-21 | Hitachi, Ltd. | Sheet feeding device and method for feeding thin sheets with no buckling |
US5932313A (en) * | 1997-04-17 | 1999-08-03 | Lexmark International, Inc. | Rubber-based paper feed rollers |
US6194478B1 (en) * | 1997-12-29 | 2001-02-27 | World Properties, Inc. | Document feeding component and method of manufacture thereof |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4019730A (en) * | 1975-06-05 | 1977-04-26 | Pitney-Bowes, Inc. | Envelope stacking system |
DE3725024A1 (en) | 1987-07-29 | 1989-02-09 | Winter & Sohn Ernst | METHOD AND ARRANGEMENT FOR GRINDING WORKPIECES WITH PROFILES |
US4887340A (en) | 1987-10-20 | 1989-12-19 | Sumitomo Electric Industries, Ltd. | Elastic fixing roller |
US5007627A (en) * | 1987-12-24 | 1991-04-16 | Eastman Kodak Company | Scuff sheet separating device |
JP2673721B2 (en) | 1989-05-24 | 1997-11-05 | キヤノン株式会社 | Fixing device |
EP0505418B1 (en) | 1989-12-13 | 1994-04-20 | Siemens Nixdorf Informationssysteme Aktiengesellschaft | Electrophotographic printer for reel paper with a thermal print-fixing station |
US5056604A (en) * | 1990-05-02 | 1991-10-15 | Xerox Corporation | Sheet feeder devices |
US5116034A (en) * | 1990-12-14 | 1992-05-26 | Hewlett-Packard Company | Envelope/sheet feed mechanism |
US5192141A (en) * | 1991-05-02 | 1993-03-09 | Tidemark Corporation | Multi-dimensional media printer with media based registration and free edge printing |
FR2682057B1 (en) | 1991-10-02 | 1995-12-08 | Createc Rollers | DEVICE FOR POSITIONING AND COUPLING A DRIVE. |
US5209464A (en) | 1992-03-23 | 1993-05-11 | Eastman Kodak Company | Bottom scuff sheet feeder |
US5435540A (en) * | 1992-12-01 | 1995-07-25 | Xerox Corporation | Apparatus and method for sheet feeding and separating using retard roll relief/enhancement |
JP2694839B2 (en) | 1993-07-20 | 1997-12-24 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Paper transport roller |
US5294102A (en) | 1993-08-13 | 1994-03-15 | Pitney Bowes Inc. | Sheet feeder separator roller |
US5333848A (en) * | 1993-09-29 | 1994-08-02 | Xerox Corporation | Retard feeder |
JP3331262B2 (en) * | 1994-07-19 | 2002-10-07 | シャープ株式会社 | Paper feeder |
JP2659344B2 (en) * | 1995-02-10 | 1997-09-30 | 日本電気ロボットエンジニアリング株式会社 | Friction feeding mechanism for paper sheets |
JP2958395B2 (en) | 1995-09-12 | 1999-10-06 | 富士ゼロックス株式会社 | Paper feeder |
JP3352891B2 (en) | 1996-10-29 | 2002-12-03 | シャープ株式会社 | Fixing device |
-
2000
- 2000-03-14 US US09/524,962 patent/US6581925B1/en not_active Expired - Lifetime
-
2001
- 2001-03-13 WO PCT/US2001/008000 patent/WO2001068494A1/en active Application Filing
- 2001-03-13 JP JP2001567007A patent/JP3934421B2/en not_active Expired - Lifetime
- 2001-03-13 DE DE10195917T patent/DE10195917T1/en not_active Ceased
- 2001-03-13 AU AU2001243613A patent/AU2001243613A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4030722A (en) * | 1975-05-13 | 1977-06-21 | Pitney-Bowes, Inc. | Sheet-material separator and feeder system |
US5271615A (en) * | 1981-08-21 | 1993-12-21 | Hitachi, Ltd. | Sheet feeding device and method for feeding thin sheets with no buckling |
US5932313A (en) * | 1997-04-17 | 1999-08-03 | Lexmark International, Inc. | Rubber-based paper feed rollers |
US6194478B1 (en) * | 1997-12-29 | 2001-02-27 | World Properties, Inc. | Document feeding component and method of manufacture thereof |
Also Published As
Publication number | Publication date |
---|---|
JP3934421B2 (en) | 2007-06-20 |
DE10195917T1 (en) | 2003-05-08 |
JP2004504992A (en) | 2004-02-19 |
US6581925B1 (en) | 2003-06-24 |
AU2001243613A1 (en) | 2001-09-24 |
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