US20110062649A1 - Sheet feeding device and image forming apparatus having same - Google Patents
Sheet feeding device and image forming apparatus having same Download PDFInfo
- Publication number
- US20110062649A1 US20110062649A1 US12/872,527 US87252710A US2011062649A1 US 20110062649 A1 US20110062649 A1 US 20110062649A1 US 87252710 A US87252710 A US 87252710A US 2011062649 A1 US2011062649 A1 US 2011062649A1
- Authority
- US
- United States
- Prior art keywords
- sheet feeding
- conveyance unit
- main body
- horizontal conveyance
- stocker
- 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
- B65H1/00—Supports or magazines for piles from which articles are to be separated
- B65H1/28—Supports or magazines for piles from which articles are to be separated compartmented to receive piles side-by-side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2220/00—Function indicators
- B65H2220/09—Function indicators indicating that several of an entity are present
-
- 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
- B65H2405/30—Other features of supports for sheets
- B65H2405/32—Supports for sheets partially insertable - extractable, e.g. upon sliding movement, 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
- B65H2405/00—Parts for holding the handled material
- B65H2405/30—Other features of supports for sheets
- B65H2405/33—Compartmented support
- B65H2405/331—Juxtaposed compartments
- B65H2405/3311—Juxtaposed compartments for storing articles horizontally or slightly inclined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/10—Ensuring correct operation
- B65H2601/11—Clearing faulty handling, e.g. jams
-
- 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
Definitions
- the invention relates to a sheet feeding device, and more specifically relates to a sheet feeding device including two sheet feeding stockers placed side by side in left and right directions, in which sheets are taken out from one sheet feeding stocker and conveyed through a horizontal conveying path provided above the other sheet feeding stocker for paper feed operation.
- the invention also relates to an image forming apparatus having such a paper feeding device.
- the sheet feeding device includes two sheet feeding stockers (decks) placed side by side in right and left directions below an image forming apparatus main body, in which sheets (paper sheets) are taken from a left-side feed stocker by a pickup roller provided in the upper part thereof, conveyed to the right direction through a horizontal conveying path provided above a right-side sheet feeding stocker, and then fed upward through a longitudinal conveying path.
- the sheets stocked in the right-side sheet feeding stocker is taken out by the pickup roller provided above the sheet feeding stocker, and fed upward through the longitudinal conveying path.
- the member constituting the horizontal conveying path (referred to as “horizontal conveyance unit”) can also be pulled from the main body in a manner independent of the two sheet feeding stockers in a direction intersecting with the feeding direction.
- horizontal conveyance unit can also be pulled from the main body in a manner independent of the two sheet feeding stockers in a direction intersecting with the feeding direction.
- the two sheet feeding stockers and the horizontal conveyance unit can be pulled out independently, and therefore when a sheet stops at a position lapping over both the left-side sheet feeding stocker and the horizontal conveyance unit at the time of jamming relating to paper feed operation, sheet tear (so-called “tearing separation”) may occur if users pull out only the horizontal conveyance unit, for example, from the main body.
- an object of the present invention is to provide a sheet feeding device which enables users to easily remove jammed sheets while preventing sheet tear at the time of jamming relating to paper feed operation.
- Another object of the present invention is to provide an image forming apparatus having such a sheet feeding device.
- a sheet feeding device in one aspect of the present invention comprising:
- first and second sheet feeding stockers provided in a main body and placed side by side in a horizontal direction, wherein
- the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit, and wherein
- an engaging mechanism is provided for engaging the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit when the horizontal conveyance unit is pulled out forward from the main body.
- An image forming apparatus in one aspect of the present invention is an image forming apparatus having the sheet feeding device.
- FIG. 1 is a front view showing an entire image forming apparatus having a sheet feeding device in one embodiment of the invention
- FIG. 2 is a cross sectional view showing the schematic configuration of the image forming apparatus
- FIG. 3 is a front view showing the layout of left-side and right-side sheet feeding stockers and a horizontal conveyance unit of the sheet feeding device;
- FIG. 4 is a perspective view showing a protrusion as an engaging mechanism provided in the horizontal conveyance unit of the sheet feeding device
- FIG. 5 is a front view showing a protrusion as a locking mechanism provided in a conveyance door of the sheet feeding device
- FIG. 6 is a perspective view showing the protrusion as a locking mechanism provided in the conveyance door of the sheet feeding device corresponding to FIG. 5 ;
- FIG. 7 is a front view showing the locking mechanism in an unlocked state
- FIG. 8 is a perspective view showing the locking mechanism in an unlocked state corresponding to FIG. 7 ;
- FIG. 9A is a plan view showing the left-side and right-side sheet feeding stockers and the horizontal conveyance unit of the sheet feeding device in the state of being housed in the main body;
- FIG. 9B is a plan view showing the horizontal conveyance unit of the sheet feeding device in the state of being pulled out from the main body together with the left-side sheet feeding stocker;
- FIG. 10 is a perspective view showing the left-side and right-side sheet feeding stockers and the horizontal conveyance unit of the sheet feeding device in the state of being housed in the main body;
- FIG. 11 is a perspective view showing the left-side sheet feeding stocker of the sheet feeding device in the state of being pulled out from the main body;
- FIG. 12 is a perspective view showing the right-side sheet feeding stocker of the sheet feeding device in the state of being pulled out from the main body;
- FIG. 13 is a perspective view showing the horizontal conveyance unit of the sheet feeding device in the state of being pulled out from the main body together with the left-side sheet feeding stocker.
- FIG. 1 shows an entire image forming apparatus (designated by reference sign 100 ) of a color tandem system having a sheet feeding device in one embodiment of the invention seen from the front side.
- FIG. 2 shows a schematic sectional configuration of the image forming apparatus 100 .
- the image forming apparatus 100 includes an intermediate transfer belt 108 as an annular image carrier provided generally in the center inside a main body casing 101 , the intermediate transfer belt 108 being wound around two rollers 102 and 106 and moving in the circumferential direction.
- One roller 102 out of two rollers 102 and 106 is placed on the left-hand side in the drawing, while the other roller 106 is placed on the right-hand side in the drawing.
- the intermediate transfer belt 108 is supported on these rollers 102 and 106 , and is rotated in an arrow X direction.
- Toner containers 128 Y, 128 M, 128 C and 128 K for storing respective color toners of yellow (Y), magenta (M), cyan (C) and black (K) are placed side by side in order from the left-hand side in the drawing above the intermediate transfer belt 108 . These toners are respectively fed from the toner containers 128 Y, 128 M, 128 C and 128 K to later-described developing devices 193 of imaging units of corresponding colors 110 Y, 110 M, 110 C and 110 K.
- the imaging units 110 Y, 110 M, 110 C and 110 K as image forming sections corresponding to respective color toners of yellow (Y), magenta (M), cyan (C) and black (K) are placed side by side in order from the left-hand side in the drawing below the intermediate transfer belt 108 .
- These imaging units 110 Y, 110 M, 110 C and 110 K are detachably mounted on the main body of the image forming apparatus 100 .
- An unshown door used for attachment and detachment of these imaging units 110 Y, 110 M, 110 C and 110 K is provided on the main body casing 101 .
- the respective imaging units 110 Y, 110 M, 110 C and 110 K have completely similar configuration except for a difference in toner color that the respective units handle. More specifically, the yellow imaging unit 110 Y for example is integrally composed of a photoconductor drum 190 , a charging device 191 , an exposure device 192 , a developing device 193 for development with use of toner, and a cleaning device 195 .
- a primary transfer roller 194 is provided in a position facing the photoconductor drum 190 across the intermediate transfer belt 108 .
- the surface of the photoconductor drum 190 is first uniformly charged by the charging device 191 , and then the surface of the photoconductor drum 190 is exposed by the exposure device 192 in response to an image signal inputted from, for example, an unshown external unit to form a latent image thereon.
- the latent image on the surface of the photoconductor drum 190 is developed into a toner image by the developing device 193 .
- This toner image is transferred onto the intermediate transfer belt 108 upon voltage application to between the photoconductor drum 190 and the primary transfer roller 194 .
- the transfer residual toner on the surface of the photoconductor drum 190 is cleaned by a cleaning device 195 .
- a cleaning device 125 for removing residual toner from the surface of the intermediate transfer belt 108 and a toner collecting box 126 for collecting the toner removed by the cleaning device 125 .
- a secondary transfer roller 112 is provided on the right-hand side of the intermediate transfer belt 108 across a conveying path 124 for paper sheets.
- Conveying rollers 120 and 119 are provided respectively at positions corresponding to upstream and downstream sides of the secondary transfer roller 112 on the conveying path 124 .
- a photo sensor (toner concentration sensor) 115 for detecting a toner pattern on the intermediate transfer belt 108 is provided integrally with the conveying roller 120 .
- a fixing device 130 for fixing toner onto paper sheets is provided on the upper right part inside the main body casing 101 .
- the fixing device 130 is composed of a paper feed sensor 116 as a paper sensor for detecting paper sheets as sheets conveyed into the fixing device 130 , a heating roller 131 extending vertically with respect to the page of FIG. 2 , and a pressure roller 132 as a pressure applying member also extending vertically with respect to the page of FIG. 2 and being in pressure contact with the heating roller 131 .
- the heating roller 131 incorporates an unshown heating source.
- the pressure roller 132 is biased toward the heating roller 131 with an unshown spring. Accordingly, the heating roller 131 and the pressure roller 132 form a nip area N for fixation.
- the toner image is fixed onto the paper sheet 90 .
- the paper feed sensor 116 is provided upstream from the nip area N with respect to a sheet conveying direction.
- the fixing device 130 operates based on the timing of the paper feed sensor 116 detecting a sheet.
- Paper cassettes 140 and 141 for respectively stocking paper sheets 90 and 91 as the sheets on which images are to be formed are provided in two levels below the imaging units 110 Y, 110 M, 110 C and 110 K within the main body casing 101 .
- Feed rollers 150 and 151 are respectively attached to upper right portions of the paper cassettes 140 and 141 in the drawing. Paper sheets 90 are sent out from the upper-side paper cassette 140 to the conveying path 124 extending upwards one by one by the feed roller 150 .
- paper sheets 91 are sent out from the lower-side paper cassette 141 to the conveying path 124 extending upward one by one by the feed roller 151 .
- a part of the conveying path 124 (a portion generally facing the right ends of the paper cassettes 140 , 141 and a later-described horizontal conveyance unit 148 ) is constituted of a conveyance door 145 which can be opened and closed with respect to the main body casing 101 .
- a first sheet feeding stocker 142 for stocking paper sheets (hereinafter referred to as “left-side sheet feeding stocker”) and a second sheet feeding stocker 143 for stocking paper sheets 93 (hereinafter referred to as “right-side sheet feeding stocker”) are placed side by side in right and left directions in the drawing.
- a horizontal conveyance unit 148 equipped with feed rollers 152 a and 152 b is provided separately from the left-side sheet feeding stocker 142 and the right-side sheet feeding stocker 143 .
- a sheet feeding unit 149 equipped with the feed rollers 153 a and 153 b is provided (the sheet feeding unit 149 is fixed to the main body casing 101 ).
- the paper sheets 92 are sent out from the left-side sheet feeding stocker 142 to the horizontal conveying path 117 formed by the horizontal conveyance unit 148 and then to the conveying path 124 extending upward one by one by the feed rollers 152 a and 152 b .
- the paper sheets 93 are sent out from the right-side paper cassette 143 to the conveying path 124 extending upwards one by one by the feed rollers 153 a and 153 b .
- FIG. 3 shows the left-side sheet feeding stocker 142 , the right-side sheet feeding stocker 143 , the horizontal conveyance unit 148 , and the sheet feeding unit 149 as the components of a sheet feeding device seen from the front side.
- a control section 200 constituted of a CPU (Central Processing Unit) shown in FIG. 2 controls the entire image forming apparatus 100 to execute image forming operation according to the print job.
- a CPU Central Processing Unit
- the paper sheets 92 are sent out by the feed rollers 152 a and 152 b from, for example, the left-side sheet feeding stocker 142 to the conveying path 124 extending upward one by one through the horizontal conveying path 117 .
- the paper sheets 92 are then sent into a toner transfer position between the intermediate transfer belt 108 and the secondary transfer roller 112 by the conveying roller 120 .
- an overlapped toner image of four colors is formed on the intermediate transfer belt 108 by each of the imaging units 110 Y, 110 M, 110 C and 110 K as mentioned before.
- the toner image of four colors on the intermediate transfer belt 108 is transferred onto a paper sheet 92 , which was sent into the above-mentioned toner transfer position, by the secondary transfer roller 112 .
- the paper sheet 92 with the toner image transferred thereon receives heat and pressure while being conveyed through the nip area N formed between the heating roller 131 and the pressure roller 132 of the fixing unit 130 .
- the toner image is fixed onto the paper sheet 92 .
- the paper sheet 92 with the toner image fixed thereto is then discharged by a paper ejecting roller 121 into a paper ejection tray section 122 provided on the upper surface of the main body casing 101 . It is to be noted that the same image forming operation applies when the paper sheets 90 , 91 , 93 are sent out to the conveying path 124 from the paper cassettes 140 , 141 or the right-side sheet feeding stocker 143 .
- the left-side sheet feeding stocker 142 , the right-side sheet feeding stocker 143 , and the horizontal conveyance unit 148 respectively have front doors 42 , 43 , and 48 integrally provided.
- the front doors 42 , 43 and 48 have handles 42 a , 43 a and 48 a , respectively. These handles 42 a , 43 a and 48 a are used by users to pull out the left-side sheet feeding stocker 142 , the right-side sheet feeding stocker 143 and the horizontal conveyance unit 148 from the main body casing 101 to the front side.
- a plate-like protrusion 48 p protruding to the left side is integrally provided at the left edge of the front door 48 of the horizontal conveyance unit 148 .
- the protrusion 48 p of the front door 48 is structured to engage with a back side portion 42 b of the front door 42 of the left-side sheet feeding stocker 142 to function as an engaging mechanism (as described later).
- the left-side sheet feeding stocker 142 is in the state of being pulled out forward (in a direction shown with an arrow a) for the sake of graphic presentation.
- a protrusion 145 p in a shape of a quarter of a circle protruding to the left side and curved downward is integrally provided in the lower part of the conveyance door 145 .
- the conveyance door 145 is attached to the main body casing 101 (see FIG. 1 ) by a hinge 146 so that it can be opened and closed with respect to the main body casing 101 .
- a hinge 146 so that it can be opened and closed with respect to the main body casing 101 .
- FIG. 6 shows the state corresponding to FIG. 5 as seen from a diagonally upward side. In the state where the conveyance door 145 is opened with respect to the main body casing 101 (in the state where the conveyance door 145 is inclined in a direction shown with an arrow c) as shown in FIG.
- a plate-like protrusion 48 p protruding to the left side is integrally provided at the left edge of the front door 48 of the horizontal conveyance unit 148 . Therefore, as seen from the above for example, in the state where the left-side and right-side sheet feeding stockers 142 and 143 and the horizontal conveyance unit 148 are housed in the main body as shown in FIG. 9A , the protrusion 48 p of the front door 48 of the horizontal conveyance unit 148 is in contact with the back side portion 42 b of the front door 42 of the left-side sheet feeding stocker 142 .
- the front doors 42 , 43 and 48 are closed to the main body casing 101 so that the left-side sheet feeding stocker 142 , the right-side sheet feeding stocker 143 and the horizontal conveyance unit 148 are in the state of being housed in the main body casing 101 as shown in FIG. 10 .
- a side panel of the main body casing 101 is omitted for easy understanding.
- the users When users wish to restock the left-side sheet feeding stocker 142 with paper sheets, the users pull the handle 42 a of the front door 42 to the front side (in the direction shown with the arrow a) as shown in FIG. 11 , and pull out the left-side sheet feeding stocker 142 forward from the main body casing 101 . In this state, users can easily load paper sheets onto the left-side sheet feeding stocker 142 .
- the protrusion 145 p of the conveyance door 145 engages with or disengages from the front side portion 148 f of the horizontal conveyance unit 148 in response to opening and closing of the conveyance door 145 with respect to the main body casing 101 , as a result of which pulling out the horizontal conveyance unit 148 from the main body casing 101 is permitted or prohibited (locked). Therefore, at the time of jamming relating to paper feed operation, users can unconsciously cancel locking mechanism ( 145 p , 148 f ) with respect to the horizontal conveyance unit 148 .
- the sheet feeding device of the invention is widely applicable not only to image forming apparatuses but also to various equipment having a conveyance system similar to that in the image forming apparatus 100 .
- a sheet feeding device in one aspect of the present invention comprises:
- first and second sheet feeding stockers provided in a main body and placed side by side in a horizontal direction, wherein
- the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit, and wherein
- an engaging mechanism is provided for engaging the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit when the horizontal conveyance unit is pulled out forward from the main body.
- the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit. Therefore, for restocking paper sheets, users can easily load sheets onto the first and second sheet feeding stockers in the state where the respective first and second sheet feeding stockers are pulled out independently or both of them are pulled out forward from the main body.
- users are assumed to pull out the horizontal conveyance unit forward from the main body. In that case, an engaging mechanism engages the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit. This enables users to easily remove jammed paper sheets while preventing paper sheet tear even when the paper sheets stop at a position lapping over both the first sheet feeding stocker and the horizontal conveyance unit at the time of jamming relating to paper feed operation.
- the engaging mechanism includes a protrusion protruding horizontally from an edge of a front door of the horizontal conveyance unit so as to overlap with a back side portion of a front door of the first sheet feeding stocker.
- the sheet feeding device of one embodiment comprises a locking mechanism which permits the horizontal conveyance unit to be pulled out forward from the main body at a time of jamming relating to paper feed operation while prohibiting the horizontal conveyance unit from being pulled out forward from the main body at a time other than jamming relating to paper feed operation.
- the horizontal conveyance unit is permitted to be pulled out forward from the main body at the time of jamming relating to paper feed operation. Therefore, users can easily pull out the horizontal conveyance unit forward from the main body together with the first sheet feeding stocker. As a result, users can easily remove jammed sheets while preventing sheet tear as mentioned before.
- the horizontal conveyance unit is prohibited from being pulled out forward from the main body by the locking mechanism. As a consequence, the horizontal conveyance unit is prevented from being unnecessarily pulled out from the main body.
- a door which can be opened and closed with respect to the main body, the door being provided in a region of a lateral surface of the main body which faces an end portion of the horizontal conveyance unit, wherein
- the locking mechanism executes permitting or prohibiting operation according to opening and closing of the door with respect to the main body.
- a door which can be opened and closed with respect to the main body is generally provided in this region to facilitate jam processing.
- users first open the door, find out a jammed sheet, and try to remove the sheet.
- the locking mechanism executes permitting or prohibiting operation according to opening and closing of the door with respect to the main body. Therefore, when the door is opened with respect to the main body for jam processing, the horizontal conveyance unit is permitted to be pulled out forward from the main body.
- the door should preferably constitute a part of the conveying path for conveying the sheets.
- the locking mechanism includes a protrusion which can engage with a front side portion of the horizontal conveyance unit, the locking mechanism being provided in the region of the lateral surface of the main body which faces the end portion of the horizontal conveyance unit.
- the protrusion has a circular arc shape horizontally protruding from the region and curved downward.
- An image forming apparatus in one aspect of the present invention comprises the sheet feeding device.
- the image forming apparatus has the sheet feeding device, which enables users to easily remove jammed sheets while preventing sheet tear at the time of jamming relating to paper feed operation.
- the sheet feeding device or the image forming apparatus of the invention users can easily remove jammed sheets while preventing sheet tear at the time of jamming relating to paper feed operation.
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Abstract
A sheet feeding device includes first and second sheet feeding stocker provided in a main body and placed side by side in a horizontal direction, in which sheets are taken out from the first sheet feeding stocker and conveyed through a horizontal conveyance unit provided above the second sheet feeding stocker. The respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit. The sheet feeding device includes an engaging mechanism for engaging the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit when the horizontal conveyance unit is pulled out forward from the main body.
Description
- This application is based on an application No. 2009-213298 filed in Japan on Sep. 15, 2009, the entire content of which is hereby incorporated by reference.
- The invention relates to a sheet feeding device, and more specifically relates to a sheet feeding device including two sheet feeding stockers placed side by side in left and right directions, in which sheets are taken out from one sheet feeding stocker and conveyed through a horizontal conveying path provided above the other sheet feeding stocker for paper feed operation.
- The invention also relates to an image forming apparatus having such a paper feeding device.
- One example of conventional image forming apparatuses having a sheet feeding device of this kind has been disclosed in JP H05-097262 A. The sheet feeding device includes two sheet feeding stockers (decks) placed side by side in right and left directions below an image forming apparatus main body, in which sheets (paper sheets) are taken from a left-side feed stocker by a pickup roller provided in the upper part thereof, conveyed to the right direction through a horizontal conveying path provided above a right-side sheet feeding stocker, and then fed upward through a longitudinal conveying path. The sheets stocked in the right-side sheet feeding stocker is taken out by the pickup roller provided above the sheet feeding stocker, and fed upward through the longitudinal conveying path.
- These two sheet feeding stockers can be pulled from the main body in directions intersecting with the respective feeding directions. The member constituting the horizontal conveying path (referred to as “horizontal conveyance unit”) can also be pulled from the main body in a manner independent of the two sheet feeding stockers in a direction intersecting with the feeding direction. With this configuration, users can easily remove jammed sheets by respectively pulling the two sheet feeding stockers and the horizontal conveyance unit at the time of jamming relating to paper feeding operation.
- However, in the above configuration, the two sheet feeding stockers and the horizontal conveyance unit can be pulled out independently, and therefore when a sheet stops at a position lapping over both the left-side sheet feeding stocker and the horizontal conveyance unit at the time of jamming relating to paper feed operation, sheet tear (so-called “tearing separation”) may occur if users pull out only the horizontal conveyance unit, for example, from the main body.
- Accordingly, an object of the present invention is to provide a sheet feeding device which enables users to easily remove jammed sheets while preventing sheet tear at the time of jamming relating to paper feed operation.
- Another object of the present invention is to provide an image forming apparatus having such a sheet feeding device.
- In order to accomplish the above object, a sheet feeding device in one aspect of the present invention, comprising:
- first and second sheet feeding stockers provided in a main body and placed side by side in a horizontal direction, wherein
- sheets are taken out from the first sheet feeding stocker and conveyed through a horizontal conveyance unit provided above the second sheet feeding stocker, wherein
- the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit, and wherein
- an engaging mechanism is provided for engaging the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit when the horizontal conveyance unit is pulled out forward from the main body.
- An image forming apparatus in one aspect of the present invention is an image forming apparatus having the sheet feeding device.
- The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
-
FIG. 1 is a front view showing an entire image forming apparatus having a sheet feeding device in one embodiment of the invention; -
FIG. 2 is a cross sectional view showing the schematic configuration of the image forming apparatus; -
FIG. 3 is a front view showing the layout of left-side and right-side sheet feeding stockers and a horizontal conveyance unit of the sheet feeding device; -
FIG. 4 is a perspective view showing a protrusion as an engaging mechanism provided in the horizontal conveyance unit of the sheet feeding device; -
FIG. 5 is a front view showing a protrusion as a locking mechanism provided in a conveyance door of the sheet feeding device; -
FIG. 6 is a perspective view showing the protrusion as a locking mechanism provided in the conveyance door of the sheet feeding device corresponding toFIG. 5 ; -
FIG. 7 is a front view showing the locking mechanism in an unlocked state; -
FIG. 8 is a perspective view showing the locking mechanism in an unlocked state corresponding toFIG. 7 ; -
FIG. 9A is a plan view showing the left-side and right-side sheet feeding stockers and the horizontal conveyance unit of the sheet feeding device in the state of being housed in the main body; -
FIG. 9B is a plan view showing the horizontal conveyance unit of the sheet feeding device in the state of being pulled out from the main body together with the left-side sheet feeding stocker; -
FIG. 10 is a perspective view showing the left-side and right-side sheet feeding stockers and the horizontal conveyance unit of the sheet feeding device in the state of being housed in the main body; -
FIG. 11 is a perspective view showing the left-side sheet feeding stocker of the sheet feeding device in the state of being pulled out from the main body; -
FIG. 12 is a perspective view showing the right-side sheet feeding stocker of the sheet feeding device in the state of being pulled out from the main body; and -
FIG. 13 is a perspective view showing the horizontal conveyance unit of the sheet feeding device in the state of being pulled out from the main body together with the left-side sheet feeding stocker. -
FIG. 1 shows an entire image forming apparatus (designated by reference sign 100) of a color tandem system having a sheet feeding device in one embodiment of the invention seen from the front side.FIG. 2 shows a schematic sectional configuration of theimage forming apparatus 100. As shown inFIG. 2 , theimage forming apparatus 100 includes anintermediate transfer belt 108 as an annular image carrier provided generally in the center inside amain body casing 101, theintermediate transfer belt 108 being wound around tworollers roller 102 out of tworollers other roller 106 is placed on the right-hand side in the drawing. Theintermediate transfer belt 108 is supported on theserollers -
Toner containers intermediate transfer belt 108. These toners are respectively fed from thetoner containers devices 193 of imaging units ofcorresponding colors - The
imaging units intermediate transfer belt 108. Theseimaging units image forming apparatus 100. An unshown door used for attachment and detachment of theseimaging units main body casing 101. - The
respective imaging units yellow imaging unit 110Y for example is integrally composed of aphotoconductor drum 190, acharging device 191, anexposure device 192, a developingdevice 193 for development with use of toner, and acleaning device 195. Aprimary transfer roller 194 is provided in a position facing thephotoconductor drum 190 across theintermediate transfer belt 108. At the time of image formation, the surface of thephotoconductor drum 190 is first uniformly charged by thecharging device 191, and then the surface of thephotoconductor drum 190 is exposed by theexposure device 192 in response to an image signal inputted from, for example, an unshown external unit to form a latent image thereon. Next, the latent image on the surface of thephotoconductor drum 190 is developed into a toner image by the developingdevice 193. This toner image is transferred onto theintermediate transfer belt 108 upon voltage application to between thephotoconductor drum 190 and theprimary transfer roller 194. The transfer residual toner on the surface of thephotoconductor drum 190 is cleaned by acleaning device 195. - As the
intermediate transfer belt 108 moves in the arrow X direction, overlapped toner images of four colors are formed on theintermediate transfer belt 108 by each of theimaging units - Provided on the left-hand side of the
intermediate transfer belt 108 are acleaning device 125 for removing residual toner from the surface of theintermediate transfer belt 108 and atoner collecting box 126 for collecting the toner removed by thecleaning device 125. Asecondary transfer roller 112 is provided on the right-hand side of theintermediate transfer belt 108 across aconveying path 124 for paper sheets.Conveying rollers secondary transfer roller 112 on theconveying path 124. It is to be noted that a photo sensor (toner concentration sensor) 115 for detecting a toner pattern on theintermediate transfer belt 108 is provided integrally with theconveying roller 120. - A
fixing device 130 for fixing toner onto paper sheets is provided on the upper right part inside themain body casing 101. Thefixing device 130 is composed of apaper feed sensor 116 as a paper sensor for detecting paper sheets as sheets conveyed into thefixing device 130, aheating roller 131 extending vertically with respect to the page ofFIG. 2 , and apressure roller 132 as a pressure applying member also extending vertically with respect to the page ofFIG. 2 and being in pressure contact with theheating roller 131. In this example, theheating roller 131 incorporates an unshown heating source. Thepressure roller 132 is biased toward theheating roller 131 with an unshown spring. Accordingly, theheating roller 131 and thepressure roller 132 form a nip area N for fixation. As a sheet (e.g., paper sheet 90) carrying a toner image transferred thereon passes through the nip area N, the toner image is fixed onto thepaper sheet 90. It is to be noted that thepaper feed sensor 116 is provided upstream from the nip area N with respect to a sheet conveying direction. The fixingdevice 130 operates based on the timing of thepaper feed sensor 116 detecting a sheet. -
Paper cassettes paper sheets imaging units main body casing 101.Feed rollers paper cassettes Paper sheets 90 are sent out from the upper-side paper cassette 140 to the conveyingpath 124 extending upwards one by one by thefeed roller 150. Similarly,paper sheets 91 are sent out from the lower-side paper cassette 141 to the conveyingpath 124 extending upward one by one by thefeed roller 151. It is to be noted that a part of the conveying path 124 (a portion generally facing the right ends of thepaper cassettes conveyance door 145 which can be opened and closed with respect to themain body casing 101. - In a position corresponding to the lowermost part of the main body casing 101 below the
paper cassette 141, a firstsheet feeding stocker 142 for stocking paper sheets (hereinafter referred to as “left-side sheet feeding stocker”) and a secondsheet feeding stocker 143 for stocking paper sheets 93 (hereinafter referred to as “right-side sheet feeding stocker”) are placed side by side in right and left directions in the drawing. In a position corresponding to a section directly above the right-sidesheet feeding stocker 143, ahorizontal conveyance unit 148 equipped withfeed rollers sheet feeding stocker 142 and the right-sidesheet feeding stocker 143. In a position corresponding to the right-hand side of the right-sidesheet feeding stocker 143, asheet feeding unit 149 equipped with thefeed rollers sheet feeding unit 149 is fixed to the main body casing 101). Thepaper sheets 92 are sent out from the left-sidesheet feeding stocker 142 to the horizontal conveyingpath 117 formed by thehorizontal conveyance unit 148 and then to the conveyingpath 124 extending upward one by one by thefeed rollers paper sheets 93 are sent out from the right-side paper cassette 143 to the conveyingpath 124 extending upwards one by one by thefeed rollers FIG. 3 shows the left-sidesheet feeding stocker 142, the right-sidesheet feeding stocker 143, thehorizontal conveyance unit 148, and thesheet feeding unit 149 as the components of a sheet feeding device seen from the front side. - When the
image forming apparatus 100 receives a print job from the outside for example, acontrol section 200 constituted of a CPU (Central Processing Unit) shown inFIG. 2 controls the entireimage forming apparatus 100 to execute image forming operation according to the print job. - At the time of image formation, the
paper sheets 92 are sent out by thefeed rollers sheet feeding stocker 142 to the conveyingpath 124 extending upward one by one through the horizontal conveyingpath 117. Thepaper sheets 92 are then sent into a toner transfer position between theintermediate transfer belt 108 and thesecondary transfer roller 112 by the conveyingroller 120. Meanwhile, an overlapped toner image of four colors is formed on theintermediate transfer belt 108 by each of theimaging units intermediate transfer belt 108 is transferred onto apaper sheet 92, which was sent into the above-mentioned toner transfer position, by thesecondary transfer roller 112. Thepaper sheet 92 with the toner image transferred thereon receives heat and pressure while being conveyed through the nip area N formed between theheating roller 131 and thepressure roller 132 of the fixingunit 130. As a result, the toner image is fixed onto thepaper sheet 92. Thepaper sheet 92 with the toner image fixed thereto is then discharged by apaper ejecting roller 121 into a paperejection tray section 122 provided on the upper surface of themain body casing 101. It is to be noted that the same image forming operation applies when thepaper sheets path 124 from thepaper cassettes sheet feeding stocker 143. - As shown in
FIG. 1 , the left-sidesheet feeding stocker 142, the right-sidesheet feeding stocker 143, and thehorizontal conveyance unit 148 respectively havefront doors front doors handles sheet feeding stocker 142, the right-sidesheet feeding stocker 143 and thehorizontal conveyance unit 148 from the main body casing 101 to the front side. - As shown in
FIG. 4 , a plate-like protrusion 48 p protruding to the left side is integrally provided at the left edge of thefront door 48 of thehorizontal conveyance unit 148. Theprotrusion 48 p of thefront door 48 is structured to engage with aback side portion 42 b of thefront door 42 of the left-sidesheet feeding stocker 142 to function as an engaging mechanism (as described later). InFIG. 4 , the left-sidesheet feeding stocker 142 is in the state of being pulled out forward (in a direction shown with an arrow a) for the sake of graphic presentation. - As shown in
FIG. 5 , aprotrusion 145 p in a shape of a quarter of a circle protruding to the left side and curved downward is integrally provided in the lower part of theconveyance door 145. Theconveyance door 145 is attached to the main body casing 101 (seeFIG. 1 ) by ahinge 146 so that it can be opened and closed with respect to themain body casing 101. When theconveyance door 145 is in the state of being closed with respect to the main body casing 101 (in the state where theconveyance door 145 stands perpendicularly as shown inFIG. 5 ), theprotrusion 145 p of theconveyance door 145 engages with afront side portion 148 f of thehorizontal conveyance unit 148 and functions as a locking mechanism for prohibiting thehorizontal conveyance unit 148 from being pulled out forward from themain body casing 101.FIG. 6 shows the state corresponding toFIG. 5 as seen from a diagonally upward side. In the state where theconveyance door 145 is opened with respect to the main body casing 101 (in the state where theconveyance door 145 is inclined in a direction shown with an arrow c) as shown inFIG. 7 , engagement between theprotrusion 145 p of theconveyance door 145 and thefront side portion 148 f of thehorizontal conveyance unit 148 is canceled so that thehorizontal conveyance unit 148 is permitted to be pulled out forward from themain body casing 101. Therefore, as shown inFIG. 8 , users can pull out thehorizontal conveyance unit 148 from the main body casing 101 to the front side (direction shown with an arrow b). - As described before, a plate-
like protrusion 48 p protruding to the left side is integrally provided at the left edge of thefront door 48 of thehorizontal conveyance unit 148. Therefore, as seen from the above for example, in the state where the left-side and right-sidesheet feeding stockers horizontal conveyance unit 148 are housed in the main body as shown inFIG. 9A , theprotrusion 48 p of thefront door 48 of thehorizontal conveyance unit 148 is in contact with theback side portion 42 b of thefront door 42 of the left-sidesheet feeding stocker 142. When users try to pull out thehorizontal conveyance unit 148 to the front side (in the direction shown with the arrow b) in this state, theprotrusion 48 p of thefront door 48 of thehorizontal conveyance unit 148 engages with theback side portion 42 b of thefront door 42 of the left-sidesheet feeding stocker 142 as shown inFIG. 9B , so that the left-sidesheet feeding stocker 142 is pulled out integrally with thehorizontal conveyance unit 148. It is to be noted that inFIG. 9B , stationary members are shaded for easy understanding. - In this image forming apparatus, the following operations are executed with respect to the sheet feeding device.
- First, during operation of the image forming apparatus, the
front doors sheet feeding stocker 142, the right-sidesheet feeding stocker 143 and thehorizontal conveyance unit 148 are in the state of being housed in the main body casing 101 as shown inFIG. 10 . It is to be noted that inFIG. 10 and later-describedFIG. 11 ,FIG. 12 andFIG. 13 , a side panel of themain body casing 101 is omitted for easy understanding. - When users wish to restock the left-side
sheet feeding stocker 142 with paper sheets, the users pull thehandle 42 a of thefront door 42 to the front side (in the direction shown with the arrow a) as shown inFIG. 11 , and pull out the left-sidesheet feeding stocker 142 forward from themain body casing 101. In this state, users can easily load paper sheets onto the left-sidesheet feeding stocker 142. - Similarly, when users wish to restock the right-side
sheet feeding stocker 143 with paper sheets, the users pull thehandle 43 a of thefront door 43 to the front side (in the direction shown with an arrow d) as shown inFIG. 12 and pull out the right-sidesheet feeding stocker 143 forward from themain body casing 101. In this state, users can easily load paper sheets onto the right-sidesheet feeding stocker 143. - It is to be noted that for restocking both the left-side and right-side
sheet feeding stockers front doors sheet feeding stockers main body casing 101. In this state, users can easily load paper sheets onto both the left-side and right-sidesheet feeding stockers - At the time of jamming relating to paper feed operation, it is predetermined as procedures of jam processing that the
conveyance door 145 is first opened as shown inFIG. 7 , and a jammed paper, if visible, is removed, or thehorizontal conveyance unit 148 is pulled out forward if a jammed paper is invisible. Such procedures may be prescribed in a manual or may be presented to users by a device structured so that the procedures are displayed at the time of jam occurrence. - It is assumed herein that users try to pull out the
horizontal conveyance unit 148 to the front side (in the direction shown with the arrow b) as shown inFIG. 13 according to the procedures of the jam processing prescribed by the manual. In this case, since theconveyance door 145 is opened with respect to themain body casing 101, engagement between theprotrusion 145 p of theconveyance door 145 and thefront side portion 148 f of thehorizontal conveyance unit 148 is canceled so that thehorizontal conveyance unit 148 is permitted to be pulled out forward from the main body casing 101 (seeFIG. 7 ). Consequently, when users try to pull out thehorizontal conveyance unit 148 to the front side (in the direction shown with the arrow b) in this state, theprotrusion 48 p of thefront door 48 of thehorizontal conveyance unit 148 engages with the back side portion 48 b of thefront door 42 of the left-sidesheet feeding stocker 142 as shown inFIG. 13 , so that the left-sidesheet feeding stocker 142 is pulled out integrally with thehorizontal conveyance unit 148. This enables users to easily remove jammed paper sheets while preventing paper sheet tear even when the paper sheets stop at a position lapping over both the left-sidesheet feeding stocker 142 and thehorizontal conveyance unit 148 at the time of jamming relating to paper feed operation. - Next, it is assumed that users try to pull out the
horizontal conveyance unit 148 to the front side (in the direction shown with the arrow b) at the time other than jamming relating to paper feed operation (at the time of normal operation for example). In this case, since theconveyance door 145 is closed with respect to themain body casing 101, theprotrusion 145 p of theconveyance door 145 engages with thefront side portion 148 f of thehorizontal conveyance unit 148 so that thehorizontal conveyance unit 148 is prohibited from being pulled out forward from themain body casing 101. As a result, thehorizontal conveyance unit 148 is prevented from being unnecessarily pulled out from themain body casing 101. - In the above-mentioned embodiment, the
protrusion 145 p of theconveyance door 145 engages with or disengages from thefront side portion 148 f of thehorizontal conveyance unit 148 in response to opening and closing of theconveyance door 145 with respect to themain body casing 101, as a result of which pulling out thehorizontal conveyance unit 148 from themain body casing 101 is permitted or prohibited (locked). Therefore, at the time of jamming relating to paper feed operation, users can unconsciously cancel locking mechanism (145 p, 148 f) with respect to thehorizontal conveyance unit 148. - It should be understood that the sheet feeding device of the invention is widely applicable not only to image forming apparatuses but also to various equipment having a conveyance system similar to that in the
image forming apparatus 100. - As is described above, a sheet feeding device in one aspect of the present invention comprises:
- first and second sheet feeding stockers provided in a main body and placed side by side in a horizontal direction, wherein
- sheets are taken out from the first sheet feeding stocker and conveyed through a horizontal conveyance unit provided above the second sheet feeding stocker, wherein
- the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit, and wherein
- an engaging mechanism is provided for engaging the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit when the horizontal conveyance unit is pulled out forward from the main body.
- In this sheet feeding device, the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit. Therefore, for restocking paper sheets, users can easily load sheets onto the first and second sheet feeding stockers in the state where the respective first and second sheet feeding stockers are pulled out independently or both of them are pulled out forward from the main body. At the time of jamming relating to paper feed operation, users are assumed to pull out the horizontal conveyance unit forward from the main body. In that case, an engaging mechanism engages the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit. This enables users to easily remove jammed paper sheets while preventing paper sheet tear even when the paper sheets stop at a position lapping over both the first sheet feeding stocker and the horizontal conveyance unit at the time of jamming relating to paper feed operation.
- In the sheet feeding device of one embodiment, the engaging mechanism includes a protrusion protruding horizontally from an edge of a front door of the horizontal conveyance unit so as to overlap with a back side portion of a front door of the first sheet feeding stocker.
- The sheet feeding device of one embodiment comprises a locking mechanism which permits the horizontal conveyance unit to be pulled out forward from the main body at a time of jamming relating to paper feed operation while prohibiting the horizontal conveyance unit from being pulled out forward from the main body at a time other than jamming relating to paper feed operation.
- In the sheet feeding device of this one embodiment, the horizontal conveyance unit is permitted to be pulled out forward from the main body at the time of jamming relating to paper feed operation. Therefore, users can easily pull out the horizontal conveyance unit forward from the main body together with the first sheet feeding stocker. As a result, users can easily remove jammed sheets while preventing sheet tear as mentioned before. At the time other than jamming relating to paper feed operation, the horizontal conveyance unit is prohibited from being pulled out forward from the main body by the locking mechanism. As a consequence, the horizontal conveyance unit is prevented from being unnecessarily pulled out from the main body.
- The sheet feeding device of one embodiment comprises:
- a door which can be opened and closed with respect to the main body, the door being provided in a region of a lateral surface of the main body which faces an end portion of the horizontal conveyance unit, wherein
- the locking mechanism executes permitting or prohibiting operation according to opening and closing of the door with respect to the main body.
- At the time of jamming relating to paper feed operation, jammed sheets tend to exist in a region of the lateral surface of the main body which faces an end portion of the horizontal conveyance unit. Accordingly, a door which can be opened and closed with respect to the main body is generally provided in this region to facilitate jam processing. At the time of jam processing, users first open the door, find out a jammed sheet, and try to remove the sheet. In this regard, in the sheet feeding device of this one embodiment, the locking mechanism executes permitting or prohibiting operation according to opening and closing of the door with respect to the main body. Therefore, when the door is opened with respect to the main body for jam processing, the horizontal conveyance unit is permitted to be pulled out forward from the main body. As a result, users can easily remove a jammed sheet while preventing sheet tear as mentioned before. At the time other than jamming relating to paper feed operation, the door is closed with respect to the main body, so that the locking mechanism prohibits the horizontal conveyance unit from being pulled out forward from the main body. As a consequence, the horizontal conveyance unit is prevented from being unnecessarily pulled out from the main body as described before. With this configuration, users can unconsciously unlock the locking mechanism at the time of jamming relating to paper feed operation.
- It is to be noted that the door should preferably constitute a part of the conveying path for conveying the sheets.
- In the sheet feeding device of one embodiment, the locking mechanism includes a protrusion which can engage with a front side portion of the horizontal conveyance unit, the locking mechanism being provided in the region of the lateral surface of the main body which faces the end portion of the horizontal conveyance unit.
- In the sheet feeding device of one embodiment, the protrusion has a circular arc shape horizontally protruding from the region and curved downward.
- An image forming apparatus in one aspect of the present invention comprises the sheet feeding device.
- The image forming apparatus has the sheet feeding device, which enables users to easily remove jammed sheets while preventing sheet tear at the time of jamming relating to paper feed operation.
- As is clear from the above, according to the sheet feeding device or the image forming apparatus of the invention, users can easily remove jammed sheets while preventing sheet tear at the time of jamming relating to paper feed operation.
- The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Claims (7)
1. A sheet feeding device, comprising:
first and second sheet feeding stockers provided in a main body and placed side by side in a horizontal direction, wherein
sheets are taken out from the first sheet feeding stocker and conveyed through a horizontal conveyance unit provided above the second sheet feeding stocker, wherein
the respective first and second sheet feeding stockers can independently be pulled out forward from the main body in a direction intersecting with a sheet conveying direction in the horizontal conveyance unit, and wherein
an engaging mechanism is provided for engaging the horizontal conveyance unit and the first sheet feeding stocker so that the first sheet feeding stocker is pulled out integrally with the horizontal conveyance unit when the horizontal conveyance unit is pulled out forward from the main body.
2. The sheet feeding device as claimed in claim 1 , wherein
the engaging mechanism includes a protrusion protruding horizontally from an edge of a front door of the horizontal conveyance unit so as to overlap with a back side portion of a front door of the first sheet feeding stocker.
3. The sheet feeding device as claimed in claim 1 , comprising:
a locking mechanism which permits the horizontal conveyance unit to be pulled out forward from the main body at a time of jamming relating to paper feed operation while prohibiting the horizontal conveyance unit from being pulled out forward from the main body at a time other than jamming relating to paper feed operation.
4. The sheet feeding device as claimed in claim 3 , comprising:
a door which can be opened and closed with respect to the main body, the door being provided in a region of a lateral surface of the main body which faces an end portion of the horizontal conveyance unit, wherein
the locking mechanism executes permitting or prohibiting operation according to opening and closing of the door with respect to the main body.
5. The sheet feeding device as claimed in claim 3 , wherein
the locking mechanism includes a protrusion which can engage with a front side portion of the horizontal conveyance unit, the locking mechanism being provided in the region of the lateral surface of the main body which faces the end portion of the horizontal conveyance unit.
6. The sheet feeding device as claimed in claim 5 , wherein
the protrusion has a circular arc shape horizontally protruding from the region and curved downward.
7. An image forming apparatus comprising the sheet feeding device as claimed in claim 1 .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2009-213298 | 2009-09-15 | ||
JP2009213298A JP2011063340A (en) | 2009-09-15 | 2009-09-15 | Paper feed device and image forming device having the same |
Publications (1)
Publication Number | Publication Date |
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US20110062649A1 true US20110062649A1 (en) | 2011-03-17 |
Family
ID=43729709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/872,527 Abandoned US20110062649A1 (en) | 2009-09-15 | 2010-08-31 | Sheet feeding device and image forming apparatus having same |
Country Status (3)
Country | Link |
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US (1) | US20110062649A1 (en) |
JP (1) | JP2011063340A (en) |
CN (1) | CN102020123A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9302864B2 (en) * | 2014-04-24 | 2016-04-05 | Kyocera Document Solutions Inc. | Sheet conveying device, and image forming apparatus including the same |
US11274001B2 (en) * | 2019-03-19 | 2022-03-15 | Konica Minolta, Inc. | Recording medium feeder and image forming apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7251285B2 (en) * | 2019-04-19 | 2023-04-04 | 京セラドキュメントソリューションズ株式会社 | image forming device |
Citations (4)
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US5368285A (en) * | 1991-02-28 | 1994-11-29 | Canon Kabushiki Kaisha | Automatic sheet feeding apparatus |
US5854965A (en) * | 1992-12-18 | 1998-12-29 | Canon Kabushiki Kaisha | Duplex image forming apparatus with front surface up discharge control |
US5988622A (en) * | 1996-11-15 | 1999-11-23 | Fuji Xerox Co., Ltd. | Paper feeding device |
US6722647B2 (en) * | 2000-12-19 | 2004-04-20 | Oki Data Corporation | Paper transporting apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2625057B2 (en) * | 1991-02-28 | 1997-06-25 | キヤノン株式会社 | Automatic paper feeder and image forming device |
JPH06263276A (en) * | 1993-03-15 | 1994-09-20 | Ricoh Co Ltd | Paper feeder |
US5472183A (en) * | 1994-03-17 | 1995-12-05 | Nisca Corporation | Sheet feeding device with multiple sheet stackers |
JPH08157081A (en) * | 1994-12-02 | 1996-06-18 | Ricoh Co Ltd | Image forming device |
JP3205702B2 (en) * | 1996-05-31 | 2001-09-04 | キヤノン株式会社 | Image forming device |
JP2007112583A (en) * | 2005-10-20 | 2007-05-10 | Ricoh Co Ltd | Image forming device |
JP4743096B2 (en) * | 2006-11-29 | 2011-08-10 | コニカミノルタビジネステクノロジーズ株式会社 | Paper feeder |
-
2009
- 2009-09-15 JP JP2009213298A patent/JP2011063340A/en active Pending
-
2010
- 2010-08-31 US US12/872,527 patent/US20110062649A1/en not_active Abandoned
- 2010-09-14 CN CN2010102844779A patent/CN102020123A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5368285A (en) * | 1991-02-28 | 1994-11-29 | Canon Kabushiki Kaisha | Automatic sheet feeding apparatus |
US5854965A (en) * | 1992-12-18 | 1998-12-29 | Canon Kabushiki Kaisha | Duplex image forming apparatus with front surface up discharge control |
US5988622A (en) * | 1996-11-15 | 1999-11-23 | Fuji Xerox Co., Ltd. | Paper feeding device |
US6722647B2 (en) * | 2000-12-19 | 2004-04-20 | Oki Data Corporation | Paper transporting apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9302864B2 (en) * | 2014-04-24 | 2016-04-05 | Kyocera Document Solutions Inc. | Sheet conveying device, and image forming apparatus including the same |
US11274001B2 (en) * | 2019-03-19 | 2022-03-15 | Konica Minolta, Inc. | Recording medium feeder and image forming apparatus |
Also Published As
Publication number | Publication date |
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JP2011063340A (en) | 2011-03-31 |
CN102020123A (en) | 2011-04-20 |
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