US20050104278A1 - Feeding mechanism - Google Patents
Feeding mechanism Download PDFInfo
- Publication number
- US20050104278A1 US20050104278A1 US10/986,691 US98669104A US2005104278A1 US 20050104278 A1 US20050104278 A1 US 20050104278A1 US 98669104 A US98669104 A US 98669104A US 2005104278 A1 US2005104278 A1 US 2005104278A1
- Authority
- US
- United States
- Prior art keywords
- blocking plate
- feeding mechanism
- cam
- rotates
- shaft
- 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.)
- Abandoned
Links
Images
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
- B65H3/0661—Rollers or like rotary separators for separating inclined-stacked articles with separator rollers above the stack
-
- 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
- B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
- B65H1/20—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device controlled by weight of pile; Floating arrangements
-
- 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
-
- 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
- B65H3/565—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile for reintroducing partially separated articles in the stack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/50—Machine elements
- B65H2402/54—Springs, e.g. helical or leaf springs
Definitions
- the present invention relates in general to a feeding mechanism, and more particularly, to a feeding mechanism having a rotatable blocking plate capable of positioning media sheets precisely.
- a conventional feeding mechanism has an arm 1 , a movable restraint 2 and a tray 20 , wherein a roller 10 is disposed at the end of the arm 1 .
- the restraint 2 lifts and abuts the sheets S in a predetermined position.
- the restraint 2 lowers such that the roller 10 contacts and drives the sheets S.
- the restraint 2 abuts the sheets S in a predetermined position, however, multiple sheets may be fed, or improperly fed.
- an object of the present invention is to provide a feeding mechanism capable of positioning media sheets precisely, preventing multiple sheets intake and improper feed.
- the feeding mechanism comprises a roller and a blocking plate.
- the blocking plate rotates between a first position and a second position, abutting a sheet in the first position, and the sheet sliding thereon by gravity in the second position.
- the blocking plate and the sheet form an included angle larger in the first position than in the second position.
- FIG. 1 a and 1 b are perspective diagrams of a conventional feeding mechanism.
- FIG. 2 a and 2 b are perspective diagrams of a feeding mechanism in accordance with the present invention.
- FIG. 2 c , 2 d and 2 e are perspective diagrams of a blocking plate rotating between the first and second positions in accordance with the present invention.
- FIG. 3 a is a perspective diagram of a shaft rotating a cam in accordance with the present invention.
- FIG. 3 b is a perspective diagram of a cam in accordance with the present invention.
- FIG. 4 a is a perspective diagram of the cam rotating counterclockwise to a maximum position.
- FIG. 4 b is a perspective diagram of the cam rotating clockwise to a maximum position.
- FIG. 4 c is a perspective diagram of the blocking plate returning to the first position.
- An object of the present invention is to provide a feeding mechanism preventing multiple sheets intake and improper feed.
- the feeding mechanism is applied to a business machine, such as a printer or a scanner, has a roller R, a shaft L, a movable blocking plate 30 , a cam 4 , a tray 5 and a cover 6 .
- the blocking plate 30 is connected to a torsion spring 31 and is rotatable between a first position 3 and a second position 3 ′.
- the roller R is fixed to the shaft, and the cam 4 has a depression 410 and is rotatable on the shaft L.
- the blocking plate 30 abuts the cam 4 in the depression 410 .
- the cam 4 rotates around the shaft L clockwise such that the blocking plate 30 is pushed down to the second position 3 ′. Subsequently, the sheets S on the tray 5 are driven by the roller R. As shown in FIG. 2 b , the shaft L is fixed to the cover 6 and passes through the roller R and the cam 4 . When the cover 6 opens, the cam 4 and the roller R are separated from the blocking plate 30 , and the blocking plate 30 is returned to the first position 3 by the torsion spring 31 .
- the blocking plate 30 when in the first position 3 , the blocking plate 30 is approximately perpendicular to the sheets S, wherein the sheets S slide down and abut the blocking plate 30 by gravity.
- FIG. 2 d when the blocking plate 30 shifts to the second position 3 ′, the sheets S and the blocking plate 30 form an obtuse angle such that the sheets S spontaneously slide on the smooth surface of the blocking plate 30 by gravity.
- the upper sheets S slip a larger distance than the lower sheets S due to less frictional force and higher velocity transferred from higher potential energy.
- the upper sheets S spontaneously progress forward by gravity to be fed properly.
- the staggered sheets S are loose and capable of being fed without accidental feeding of multiple sheets.
- FIG. 2 e shows the blocking plate 30 rotating between the first position 3 and the second position 3 ′, wherein the torsion spring 31 exerts a force returning the blocking plate 30 to the first position 3 .
- the shaft L passes through the roller R, the cam 4 and the driving assembly D, wherein the driving assembly D rotates the cam 4 .
- the driving assembly D has a frictional member F, a spring P and a fixed portion E fixed to the shaft L.
- the cam 4 as shown in FIG. 3 b , has a contacting portion 41 , a restraining portion 42 and a through hole 40 through which the shaft L passes.
- the contacting portion 41 has a depression 410 disposed thereon and rotates the blocking plate 30 between the first position 3 and second position 3 ′.
- the restraining portion 42 has a protrusion 421 restricting the cam 4 's rotation to within a limited range.
- the shaft L rotates the roller R, the driving assembly D and the cam 4 clockwise, wherein the cam 4 pushes the blocking plate 30 to the second position 3 ′and the protrusion 421 abuts the restraint 61 .
- the cam 4 is held with the frictional member 421 sliding thereon, and the spring P provides elastic force such that the frictional member 421 contacts and slides with respect to the cam 4 .
- the roller R feeds the sheets S properly.
- the present invention provides a feeding mechanism having a movable blocking plate 30 capable of positioning media sheets precisely, preventing multiple sheets intake and improper feed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
A feeding mechanism. The feeding mechanism comprises a roller and a blocking plate. The blocking plate rotates between a first position and a second position, abutting a sheet when in the first position, and the sheet sliding thereon by gravity when in the second position. Particularly, the blocking plate and the sheet form an included angle larger in the first position than in the second position.
Description
- 1. Field of the Invention
- The present invention relates in general to a feeding mechanism, and more particularly, to a feeding mechanism having a rotatable blocking plate capable of positioning media sheets precisely.
- 2. Description of the Related Art
- Generally, conventional business machines, such as printers, have a media positioning device keeping sheet media in a predetermined position such that the sheets can be fed smoothly. Referring to
FIG. 1 a, a conventional feeding mechanism has an arm 1, amovable restraint 2 and atray 20, wherein aroller 10 is disposed at the end of the arm 1. When the arm raises and theroller 10 leaves the sheets S, therestraint 2 lifts and abuts the sheets S in a predetermined position. When feeding the sheets S, as shown inFIG. 1 b, therestraint 2 lowers such that theroller 10 contacts and drives the sheets S. - As mentioned, the
restraint 2 abuts the sheets S in a predetermined position, however, multiple sheets may be fed, or improperly fed. - Accordingly, an object of the present invention is to provide a feeding mechanism capable of positioning media sheets precisely, preventing multiple sheets intake and improper feed. The feeding mechanism comprises a roller and a blocking plate. The blocking plate rotates between a first position and a second position, abutting a sheet in the first position, and the sheet sliding thereon by gravity in the second position. Particularly, the blocking plate and the sheet form an included angle larger in the first position than in the second position.
- The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings, given by way of illustration only and thus not intended to be limitative of the present invention.
-
FIG. 1 a and 1 b are perspective diagrams of a conventional feeding mechanism. -
FIG. 2 a and 2 b are perspective diagrams of a feeding mechanism in accordance with the present invention. -
FIG. 2 c, 2 d and 2 e are perspective diagrams of a blocking plate rotating between the first and second positions in accordance with the present invention. -
FIG. 3 a is a perspective diagram of a shaft rotating a cam in accordance with the present invention. -
FIG. 3 b is a perspective diagram of a cam in accordance with the present invention. -
FIG. 4 a is a perspective diagram of the cam rotating counterclockwise to a maximum position. -
FIG. 4 b is a perspective diagram of the cam rotating clockwise to a maximum position. -
FIG. 4 c is a perspective diagram of the blocking plate returning to the first position. - An object of the present invention is to provide a feeding mechanism preventing multiple sheets intake and improper feed. Referring to
FIG. 2 a, the feeding mechanism is applied to a business machine, such as a printer or a scanner, has a roller R, a shaft L, amovable blocking plate 30, acam 4, atray 5 and acover 6. The blockingplate 30 is connected to atorsion spring 31 and is rotatable between afirst position 3 and asecond position 3′. The roller R is fixed to the shaft, and thecam 4 has adepression 410 and is rotatable on the shaft L. When in thefirst position 3, as shown inFIG. 2 a, theblocking plate 30 abuts thecam 4 in thedepression 410. Moreover, to feed the sheets S, thecam 4 rotates around the shaft L clockwise such that theblocking plate 30 is pushed down to thesecond position 3′. Subsequently, the sheets S on thetray 5 are driven by the roller R. As shown inFIG. 2 b, the shaft L is fixed to thecover 6 and passes through the roller R and thecam 4. When thecover 6 opens, thecam 4 and the roller R are separated from theblocking plate 30, and theblocking plate 30 is returned to thefirst position 3 by thetorsion spring 31. - Referring to
FIG. 2 c, when in thefirst position 3, theblocking plate 30 is approximately perpendicular to the sheets S, wherein the sheets S slide down and abut the blockingplate 30 by gravity. InFIG. 2 d, when theblocking plate 30 shifts to thesecond position 3′, the sheets S and theblocking plate 30 form an obtuse angle such that the sheets S spontaneously slide on the smooth surface of theblocking plate 30 by gravity. - Particularly, when the
blocking plate 30 rotates from thefirst position 3 to thesecond position 3′, the upper sheets S slip a larger distance than the lower sheets S due to less frictional force and higher velocity transferred from higher potential energy. Thus, as shown inFIG. 2 d, the upper sheets S spontaneously progress forward by gravity to be fed properly. The staggered sheets S are loose and capable of being fed without accidental feeding of multiple sheets. -
FIG. 2 e shows theblocking plate 30 rotating between thefirst position 3 and thesecond position 3′, wherein thetorsion spring 31 exerts a force returning theblocking plate 30 to thefirst position 3. Referring toFIGS. 3 a and 3 b, the shaft L passes through the roller R, thecam 4 and the driving assembly D, wherein the driving assembly D rotates thecam 4. The driving assembly D has a frictional member F, a spring P and a fixed portion E fixed to the shaft L. When the shaft L rotates the roller R and the driving assembly D, thecam 4 is driven by the frictional force between the frictional member F and thecam 4. - The
cam 4, as shown inFIG. 3 b, has a contactingportion 41, arestraining portion 42 and a throughhole 40 through which the shaft L passes. The contactingportion 41 has adepression 410 disposed thereon and rotates theblocking plate 30 between thefirst position 3 andsecond position 3′. Moreover, therestraining portion 42 has aprotrusion 421 restricting thecam 4's rotation to within a limited range. Referring toFIGS. 4 a and 4 b, when thecam 4 rotates counterclockwise to a maximum position, theprotrusion 421 ofrestraining portion 42 abuts theprotruding restraint 61 of thecover 6, wherein theblocking plate 30 is located in thedepression 410 and thefirst position 3. Thus, the sheets S are precisely positioned on thetray 5. - To feed the sheets S, as shown in
FIG. 4 b, the shaft L rotates the roller R, the driving assembly D and thecam 4 clockwise, wherein thecam 4 pushes theblocking plate 30 to thesecond position 3′and theprotrusion 421 abuts therestraint 61. Particularly, if the shaft L further rotates the roller R and the driving assembly D beyond the maximum position, thecam 4 is held with thefrictional member 421 sliding thereon, and the spring P provides elastic force such that thefrictional member 421 contacts and slides with respect to thecam 4. Thus, the roller R feeds the sheets S properly. - After feeding the sheets S, the shaft L rotates the
cam 4 and the driving assembly D counterclockwise to the maximum position as shown inFIG. 4 c. Thus, theprotrusion 421 abuts therestraint 61 such that thecam 4 is restricted preventing obstruction of theblocking plate 30. In summary, the present invention provides a feeding mechanism having amovable blocking plate 30 capable of positioning media sheets precisely, preventing multiple sheets intake and improper feed. - While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation to encompass all such modifications and similar arrangements.
Claims (10)
1. A feeding mechanism, comprising:
a roller; and
a blocking plate, rotating between a first position and a second position, abutting a media sheet in the first position, and the sheet sliding on the blocking plate by gravity in the second position, wherein the blocking plate and the sheet form an included angle larger in the first position than in the second position.
2. The feeding mechanism as claimed in claim 1 further comprising a torsion spring connected to the blocking plate, around which the blocking plate rotates.
3. The feeding mechanism as claimed in claim 1 , wherein the blocking plate is substantially perpendicular to the sheet in the first position.
4. The feeding mechanism as claimed in claim 1 , wherein the torsion spring provides a force driving the blocking plate to the first position.
5. The feeding mechanism as claimed in claim 1 further comprising a shaft and a cam, wherein the cam rotates around the shaft and rotates the blocking plate between the first and second position.
6. The feeding mechanism as claimed in claim 5 , wherein the cam comprises a depression with the blocking plate located therein when in the first position.
7. The feeding mechanism as claimed in claim 5 further comprising a driving assembly comprising a fixed portion and a frictional member, wherein the fixed portion connects to the shaft, and the frictional member contacts and rotates the cam.
8. The feeding mechanism as claimed in claim 7 , wherein the driving assembly further comprises a spring connecting the fixed portion and the frictional member.
9. The feeding mechanism as claimed in claim 5 further comprising a restraint fixed thereto, wherein the cam has a protrusion abutting the restraint when the cam rotates to a maximum position.
10. The feeding mechanism as claimed in claim 9 further comprising a driving assembly having a fixed portion and a frictional member, wherein the fixed portion connects to the shaft, and the frictional member slides on the cam when the cam rotates beyond the maximum position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TWTW92220093 | 2003-11-13 | ||
TW092220093U TWM242504U (en) | 2003-11-13 | 2003-11-13 | A sheet-feeding apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050104278A1 true US20050104278A1 (en) | 2005-05-19 |
Family
ID=34134491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/986,691 Abandoned US20050104278A1 (en) | 2003-11-13 | 2004-11-12 | Feeding mechanism |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050104278A1 (en) |
TW (1) | TWM242504U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090166955A1 (en) * | 2007-12-27 | 2009-07-02 | Digital Business Processes, Inc. | Apparatus for automatic document feeding |
US20190291981A1 (en) * | 2018-03-20 | 2019-09-26 | Pfu Limited | Medium transfer device |
US11472198B2 (en) * | 2018-04-30 | 2022-10-18 | Hewlett-Packard Development Company, L.P. | Rollers for dryer system |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5370380A (en) * | 1991-07-25 | 1994-12-06 | Canon Kabushiki Kaisha | Sheet feeding apparatus |
US5655762A (en) * | 1995-08-24 | 1997-08-12 | Hewlett-Packard Company | Mechanism for avoiding multiple sheet misfeeds in sheet media feed systems |
US5725208A (en) * | 1995-04-10 | 1998-03-10 | Canon Kabushiki Kaisha | Sheet supplying and conveying apparatus |
US5882004A (en) * | 1996-09-18 | 1999-03-16 | Hewlett-Packard Co. | Automatic sheet feeding mechanism |
US6086062A (en) * | 1996-12-25 | 2000-07-11 | Minolta Co., Ltd. | Sheet feeder unit |
US6382621B1 (en) * | 1998-11-04 | 2002-05-07 | Canon Kabushiki Kaisha | Paper feeder with movable separation slope surface and image forming apparatus equipped therewith |
US20030155702A1 (en) * | 2002-02-08 | 2003-08-21 | Toshifumi Togashi | Method and apparatus for sheet feeding and image forming apparatus incorporating the same |
US6874778B2 (en) * | 2000-10-31 | 2005-04-05 | Canon Kabushiki Kaisha | Sheet feeding apparatus and image forming apparatus provided with same |
US6877738B2 (en) * | 2001-05-10 | 2005-04-12 | Canon Kabushiki Kaisha | Sheet material feed apparatus and recording apparatus |
US7029004B2 (en) * | 2002-03-29 | 2006-04-18 | Brother Kogyo Kabushiki Kaisha | Sheet-supply device and image forming device including same |
US7226048B2 (en) * | 2004-09-29 | 2007-06-05 | Lexmark International, Inc. | Imaging apparatus having a print media dam in association with an automatic sheet feeder mechanism |
-
2003
- 2003-11-13 TW TW092220093U patent/TWM242504U/en unknown
-
2004
- 2004-11-12 US US10/986,691 patent/US20050104278A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5370380A (en) * | 1991-07-25 | 1994-12-06 | Canon Kabushiki Kaisha | Sheet feeding apparatus |
US5725208A (en) * | 1995-04-10 | 1998-03-10 | Canon Kabushiki Kaisha | Sheet supplying and conveying apparatus |
US5655762A (en) * | 1995-08-24 | 1997-08-12 | Hewlett-Packard Company | Mechanism for avoiding multiple sheet misfeeds in sheet media feed systems |
US5882004A (en) * | 1996-09-18 | 1999-03-16 | Hewlett-Packard Co. | Automatic sheet feeding mechanism |
US6086062A (en) * | 1996-12-25 | 2000-07-11 | Minolta Co., Ltd. | Sheet feeder unit |
US6382621B1 (en) * | 1998-11-04 | 2002-05-07 | Canon Kabushiki Kaisha | Paper feeder with movable separation slope surface and image forming apparatus equipped therewith |
US6874778B2 (en) * | 2000-10-31 | 2005-04-05 | Canon Kabushiki Kaisha | Sheet feeding apparatus and image forming apparatus provided with same |
US6877738B2 (en) * | 2001-05-10 | 2005-04-12 | Canon Kabushiki Kaisha | Sheet material feed apparatus and recording apparatus |
US20030155702A1 (en) * | 2002-02-08 | 2003-08-21 | Toshifumi Togashi | Method and apparatus for sheet feeding and image forming apparatus incorporating the same |
US7029004B2 (en) * | 2002-03-29 | 2006-04-18 | Brother Kogyo Kabushiki Kaisha | Sheet-supply device and image forming device including same |
US7226048B2 (en) * | 2004-09-29 | 2007-06-05 | Lexmark International, Inc. | Imaging apparatus having a print media dam in association with an automatic sheet feeder mechanism |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090166955A1 (en) * | 2007-12-27 | 2009-07-02 | Digital Business Processes, Inc. | Apparatus for automatic document feeding |
US20190291981A1 (en) * | 2018-03-20 | 2019-09-26 | Pfu Limited | Medium transfer device |
US10676297B2 (en) * | 2018-03-20 | 2020-06-09 | Pfu Limited | Medium transfer device |
US11472198B2 (en) * | 2018-04-30 | 2022-10-18 | Hewlett-Packard Development Company, L.P. | Rollers for dryer system |
Also Published As
Publication number | Publication date |
---|---|
TWM242504U (en) | 2004-09-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BENQ CORPORATION, TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIN, TSUNG-TE;REEL/FRAME:015999/0689 Effective date: 20041105 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: PARALLEL WIRELESS, INC., NEW HAMPSHIRE Free format text: RELEASE BY SECURED PARTY;ASSIGNORS:VENTURE LENDING & LEASING IX, INC.;WTI FUND X, INC.;REEL/FRAME:060900/0022 Effective date: 20220629 |