US20090102113A1 - Paper-blocking mechanism and printer using the same - Google Patents
Paper-blocking mechanism and printer using the same Download PDFInfo
- Publication number
- US20090102113A1 US20090102113A1 US12/230,971 US23097108A US2009102113A1 US 20090102113 A1 US20090102113 A1 US 20090102113A1 US 23097108 A US23097108 A US 23097108A US 2009102113 A1 US2009102113 A1 US 2009102113A1
- Authority
- US
- United States
- Prior art keywords
- paper
- stopper portion
- blocking mechanism
- printer
- exit roller
- 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
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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
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
- B65H29/14—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers and introducing into a 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
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/54—Article strippers, e.g. for stripping from advancing elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/06—Office-type machines, e.g. photocopiers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
A paper-blocking mechanism is disposed in a printer. The printer includes at least a main body and an exit roller. The paper-blocking mechanism includes a stopper portion and a stopper elastic element. The stopper elastic element is fixed on the printer and is compressibly connected with the stopper portion. When the tail of the paper leaves the stopper portion, the stopper elastic element drives the stopper portion to rise to be higher than the surface of the exit roller to block the paper exit lest the paper might be back-rolled and jammed.
Description
- This application claims the benefit of Taiwan application Serial No. 96139743, filed Oct. 23, 2007, the subject matter of which is incorporated herein by reference.
- 1. Field of the Invention
- The invention relates in general to a paper-blocking mechanism and a printer using the same, and more particularly to a paper-blocking mechanism preventing the paper from being back-rolled and a printer using the same.
- 2. Description of the Related Art
-
FIG. 1 a structural diagram of a conventional printer with an auto sheet feed (ASF). As indicated inFIG. 1 , the paper 2 placed on the paper frame 4 is fed into the printer for printing via the pick-up roller 20. After the printing is completed, the paper is conveyed via thefeed roller 30 and theexit roller 40 to leave the printer. Thefeed roller 30 and theexit roller 40 are linked by a synchronous belt (not illustrated) and rotate synchronously. -
FIGS. 2A-2B show conventional relationships between a feed roller and a pick-up roller in a paper-feeding state and a paper-printing state respectively. The pick-up roller 20 and thefeed roller 30 are driven by thesame motor 50, but the pick-up roller 20 is linked to or separated from themotor 50 via the control of anASF clutch 60. In the paper-feeding state, as indicated inFIG. 2A , the ASFclutch 60 is engaged with the gear set of the pick-up roller 20 such that the rotation of themotor 50 is transmitted to the pick-up roller 20 for taking paper. Meanwhile, themotor 50 rotates anti-clockwise, so that the pick-up roller 20 rotates clockwise to take paper. Meanwhile, thefeed roller 30 and the pick-up roller 20 rotate in the same direction, but the rotating direction of thefeed roller 30 is opposite to the paper-outputting direction. As thefeed roller 30 and theexit roller 40 ofFIG. 1 are linked by a synchronous belt and rotate synchronously in the same direction, the rotating direction of theexit roller 40 is also opposite to the paper-outputting direction. - In the printing state, as indicated in
FIG. 2B , theASF clutch 60 and the gear set of the pick-up roller 20 are separated, so that themotor 50 only drives thefeed roller 30. Meanwhile, themotor 50 rotates clockwise so that thefeed roller 30 and theexit roller 40 rotate in an anti-clock direction which is the same with the paper-outputting direction. When the pick-up roller 20 takes paper after the printing is completed, if the tail of a paper still does not completely leave theexit roller 40, the paper will be back-rolled and jammed because theexit roller 40 rotates in a direction opposite to the paper-outputting direction. - Besides, during the process of conveying a paper, the static electricity generated by the friction between the paper and the roller will cause the paper to be sucked on the exit roller and result in paper-jamming.
- The invention is directed to a paper-blocking mechanism and a printer using the same are provided. The paper-blocking mechanism blocks an outputted paper lest the paper might be back-rolled by the exit roller and jammed.
- According to a first aspect of the present invention, a paper-blocking mechanism disposed in a printer is provided. The printer includes at least an exit roller. The paper-blocking mechanism juxtaposed with the exit roller includes a stopper portion and a stopper elastic element. When a paper passes by the exit roller, the stopper portion is lower than the surface of the exit roller due to the pressure by paper. The stopper elastic element is fixed on the printer and compressibly connected with the stopper portion. When the tail of the paper leaves the stopper portion, the stopper elastic element drives the stopper portion to rise to be higher than the surface of the exit roller.
- According to a second aspect of the present invention, a printer including a main body, an exit roller and a paper-blocking mechanism is provided. The exit roller and the paper-blocking mechanism are juxtaposed on the main body. The paper-blocking mechanism includes a stopper portion and a stopper elastic element. When a paper passes by the exit roller, the stopper portion is lower than the surface of the exit roller due to the pressure by the paper. The stopper elastic element is fixed on the main body and compressibly connected with the stopper portion. When the tail of the paper leaves the stopper portion, the stopper elastic element drives the stopper portion to rise to be higher than the surface of the exit roller.
- The invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The following description is made with reference to the accompanying drawings.
-
FIG. 1 (Prior Art) shows a structural diagram of a conventional printer with an ASF; -
FIGS. 2A-2B (Prior Art) show conventional relationships between a feed roller and a pick-up roller in a paper-feeding state and a paper-printing state respectively; -
FIG. 3 shows a schematic view of a printer according to a first embodiment of the invention; -
FIG. 4 shows a lateral view of a partial structure of the printer inFIG. 3 according to the first embodiment of the invention; -
FIG. 5A shows an enlarged view of a paper-blocking mechanism inFIG. 4 before the paper is outputted; -
FIG. 5B shows an enlarged view of the paper-blocking mechanism inFIG. 4 after the paper is outputted; and -
FIG. 6 shows a lateral view of a partial structure of a printer according to a second embodiment of the invention. - Referring to both
FIG. 3 andFIG. 4 , a schematic view and a lateral view of a printer according to a first embodiment of the invention are respectively shown. The printer includes amain body 100, afeed roller 160, anexit roller 120 and a paper-blocking mechanism 110. Theexit roller 120 is disposed on themain body 100. When printing apaper 10, the paper is driven by thefeed roller 160 to enter a printing area. After the printing is completed, thepaper 10 is taken by the paper-retaining mechanism 130 and theexit roller 120 disposed on themain body 100 to leave thepaper exit 5. After thepaper 10 is outputted completely, thepaper 10 will fall onto atray 150. - The paper-
blocking mechanism 110 is disposed on themain body 100 via the connection to aspindle 116. The paper-blocking mechanism 110 is rotatable with thespindle 116. The paper-blocking mechanism 110 includes astopper portion 114 and a stopperelastic element 112. During the outputting process of thepaper 10, thestopper portion 114 is lower than the surface of theexit roller 120 due to the pressure by thepaper 10. The stopperelastic element 112 is connected to thespindle 116 and compressibly connected with thestopper portion 114 for providing thestopper portion 114 with an elastic force to support thepaper 10. After thepaper 10 is released from theexit roller 120, the stopperelastic element 112 drives thestopper portion 114 to rise to be higher than the surface of theexit roller 120 to avoid thepaper 10 being back-rolled. In the present embodiment of the invention, the stopperelastic element 112 is exemplified as a spring, and the paper-retainingmechanism 130 includes astar wheel 132 and a retainingelastomer 134. The retainingelastomer 134 is a spring disposed on themain body 100 for providing thestar wheel 132 with an elastic force to retain thepaper 10. - As indicated in
FIG. 4 , thestopper portion 114 includes asuspension arm 114 a and anextension part 114 b, wherein one end of thesuspension arm 114 a is linked to thespindle 116, and theextension part 114 b is disposed in the other end of thesuspension arm 114 a and extended in the outputting direction of thepaper 10. - Referring to
FIGS. 5A and 5B , an enlarged view of a paper-blocking mechanism inFIG. 4 before and after the paper is outputted are respectively shown. As indicatedFIG. 5A , the paper-retainingmechanism 130 and theexit roller 120 inFIG. 4 retain thepaper 10 so that thepaper 10 is strained to press thestopper portion 114 downwards. Thus, before thepaper 10 leaves thepaper exit 5, thestopper portion 114 is pressed downwards by the strain force for allowing thepaper 10 to pass smoothly. Meanwhile, the stopperelastic element 112 linked to thestopper portion 114 is compressibly connected with one end of the suspension arm and stores up an elastic force. As indicated inFIG. 5B , when the tail of thepaper 10 leaves thestopper portion 114, the elastic force stored up by the stopperelastic element 112 drives thestopper portion 114 to rise so that theextension part 114 b is higher than the surface of theexit roller 120. Despite thepaper 10 is sucked on theexit roller 120 due to static electricity or theexit roller 120 is reversed, thepaper 10 will not be driven to thepaper exit 5 and jammed. - Furthermore, the material of the
stopper portion 114 may include a conductive material made of metal or plastics doped with metallic powders. Thus, the electrostatic charges stored up on thepaper 10 will be drained lest thepaper 10 might be sucked on theexit roller 120. - Anyone who is skilled in the technology of the invention will understand that the technology of the invention is not limited thereto. As indicated in
FIG. 3 , the printer of the invention may further include a second paper-blockingmechanism 170 disposed on themain body 100 at an interval with the paper-blockingmechanism 110. Thus, the paper of different sizes can correspond to the paper-blocking mechanism deposed in different positions to avoid paper jamming. Also, the number of the paper-blocking mechanism is not limited to 1 or 2 but is determined according to the size and type of the corresponding paper. - Referring to
FIG. 6 , a lateral view of a partial structure of a printer according to a second embodiment of the invention is shown. The present embodiment of the invention differs with the first embodiment in that the second embodiment further includes a detectingdevice 180 opposite to thestopper portion 114 and disposed on themain body 100. As for other elements similar to the first embodiment, the same designations are used and are not repeated here. The detectingdevice 180 is a contact type sensor. Whether thepaper 10 is released from theexit roller 120 is determined according to the contacting state between the detectingdevice 180 and thestopper portion 114. For example, when there is no paper, the detectingdevice 180 and thestopper portion 114 contact each other. When the paper is inputted, thestopper portion 114 is pressed downwards. Meanwhile, the detectingdevice 180 no more contacts thestopper portion 114, and the detectingdevice 180 outputs a signal to inform the printer that the paper is already inputted. After the paper is outputted completely, the detectingdevice 180 contacts thestopper portion 114 again. Meanwhile, the detectingdevice 180 again outputs another signal to inform the printer that the paper has left completely. Such design assures that theexit roller 120 will not be reversed unless thestopper portion 114 bounces back, hence avoiding paper-jamming. - According to the paper-blocking mechanism and the printer using the same disclosed in the above embodiments of the invention, a paper-blocking mechanism formed by a stopper elastic element and a stopper portion effectively avoids the paper being sucked on the exit roller and jammed. Preferably, the stopper portion can be made from a conductive material to drain the electrostatic charges. Besides, a detecting device can be disposed to assure that the exit roller cannot be reversed unless the paper is completely outputted and released from the exit roller and that the paper-blocking mechanism functions effectively.
- While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
Claims (9)
1. A paper-blocking mechanism disposed in a printer comprising a main body and an exit roller, wherein the paper-blocking mechanism comprises:
a stopper portion disposed on the main body and juxtaposed with the exit roller; and
a stopper elastic element fixed on the main body and compressibly connected with the stopper portion, wherein when a paper passes by the exit roller, the stopper portion is lower than a surface of the exit roller due to a pressure by the paper, and when the tail of the paper leaves the stopper portion, the stopper portion is driven by the stopper elastic element to rise to be higher than the surface of the exit roller.
2. The paper-blocking mechanism according to claim 1 , wherein the stopper portion comprises a suspension arm and an extension part, the stopper elastic element is compressibly connected with one end of the suspension arm, and the extension part is disposed in the other end of the suspension arm and extended in an outputting direction of the paper.
3. The paper-blocking mechanism according to claim 1 , wherein the stopper elastic element is a spring.
4. The paper-blocking mechanism according to claim 1 , wherein the material of the stopper portion comprises a conductive material.
5. The paper-blocking mechanism according to claim 4 , wherein the conductive material is made of metal or plastics doped with metallic powders.
6. The paper-blocking mechanism according to claim 1 , further comprising a detecting device opposite to the stopper portion and disposed on the main body for detecting a paper-outputting state of a paper according to a contacting state between the detecting device and the stopper portion.
7. A printer, comprising:
a main body having a paper exit;
an exit roller disposed on the main body; and
at least one paper-blocking mechanism according to claim 1 .
8. The printer according to claim 7 further comprising a spindle disposed in the main body, wherein the paper-blocking mechanism is linked to the spindle and rotatable with the spindle.
9. The printer according to claim 7 further comprising a detecting device, further comprising a detecting device opposite to the stopper portion and disposed on the main body for detecting a paper-outputting state of a paper according to a contacting state between the detecting device and the stopper portion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW96139743 | 2007-10-23 | ||
TW096139743A TW200918322A (en) | 2007-10-23 | 2007-10-23 | Paper-blocking mechanism and printer using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090102113A1 true US20090102113A1 (en) | 2009-04-23 |
Family
ID=40562686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/230,971 Abandoned US20090102113A1 (en) | 2007-10-23 | 2008-09-09 | Paper-blocking mechanism and printer using the same |
Country Status (2)
Country | Link |
---|---|
US (1) | US20090102113A1 (en) |
TW (1) | TW200918322A (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5033731A (en) * | 1990-03-12 | 1991-07-23 | Xerox Corporation | Dual mode stack height and sheet delivery detector |
US5823529A (en) * | 1995-10-05 | 1998-10-20 | Xerox Corporation | Single stack height sensor for plural sheet stacking bins system |
US5951004A (en) * | 1996-06-25 | 1999-09-14 | Oce-Technologies B.V. | Method of and apparatus for buffering paper sheets |
US6142469A (en) * | 1997-11-17 | 2000-11-07 | Sharp Kabushiki Kaisha | Sheet ejecting mechanism with contact member and advance descending of tray to prevent direct return of contact member |
US6443449B1 (en) * | 1998-01-27 | 2002-09-03 | Brother Kogyo Kabushiki Kaisha | Paper sheet discharge apparatus and printing apparatus |
US6655680B1 (en) * | 2002-06-11 | 2003-12-02 | Umax Data Systems, Inc. | Document sensor and sensing method |
US20060181018A1 (en) * | 2004-11-25 | 2006-08-17 | Oce-Technologies B.V. | Sheet handling device |
-
2007
- 2007-10-23 TW TW096139743A patent/TW200918322A/en unknown
-
2008
- 2008-09-09 US US12/230,971 patent/US20090102113A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5033731A (en) * | 1990-03-12 | 1991-07-23 | Xerox Corporation | Dual mode stack height and sheet delivery detector |
US5823529A (en) * | 1995-10-05 | 1998-10-20 | Xerox Corporation | Single stack height sensor for plural sheet stacking bins system |
US5951004A (en) * | 1996-06-25 | 1999-09-14 | Oce-Technologies B.V. | Method of and apparatus for buffering paper sheets |
US6142469A (en) * | 1997-11-17 | 2000-11-07 | Sharp Kabushiki Kaisha | Sheet ejecting mechanism with contact member and advance descending of tray to prevent direct return of contact member |
US6443449B1 (en) * | 1998-01-27 | 2002-09-03 | Brother Kogyo Kabushiki Kaisha | Paper sheet discharge apparatus and printing apparatus |
US6655680B1 (en) * | 2002-06-11 | 2003-12-02 | Umax Data Systems, Inc. | Document sensor and sensing method |
US20060181018A1 (en) * | 2004-11-25 | 2006-08-17 | Oce-Technologies B.V. | Sheet handling device |
Also Published As
Publication number | Publication date |
---|---|
TW200918322A (en) | 2009-05-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: QISDA CORPORATION, TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZHAO, MING-JIE;REEL/FRAME:021575/0936 Effective date: 20080721 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |