Abstract: A printing device includes an image receptor adapted to have formed thereon an inked image layer, a transfer roller, and a transfer roller biasing system. The biasing system is structured to displace the transfer roller toward the image receptor upon actuation of a motor, exerting a backing pressure.

Abstract: An image forming device is provided with a device main body, a first cassette, a second cassette that is capable of moving between a first position and a second position with respect to the device main body, a transportation device, and a printing device. The transportation device is capable of transporting a print medium housed in the first cassette in a case where the first cassette is positioned at a predetermined position wit respect to the device main body and the second cassette is positioned at the first position. The transportation device is capable of transporting a print medium housed in the second cassette in a case where the second cassette is positioned at the second position. The printing device prints an image on the print medium transported by the transportation device. A part of the second cassette positioned at the first position and/or the second position is positioned outside the device main body.

Abstract: A printing system includes a first media holder configured to hold a plurality of sheets of media; and a second media holder configured to hold a different plurality of sheets of media. A contacting component is configured to selectively contact an individual sheet of media within the first media holder or within the second media holder. Additionally; a member, having a measurable property that is sensed by a sensor in correlation with a position of the individual sheet of the media in either the first or second media holder, provides a signal selectively indicative of the position of the individual sheet of media in either the first media holder or the second media holder.

Abstract: Assemblies and methods to move media sheets from a media stack within an image forming apparatus. These may include a pivoting arm with an attached roller that contacts the media stack and rotates to move a top-most sheet from the media stack. A clutch may be operatively connected to the arm for the arm to pivot in a first direction to maintain the roller positioned on a top of the media stack as the media stack is depleted and a height of the media stack is reduced. The clutch may also reduce movement of the arm in a second direction beyond a predetermined amount.

Abstract: A paper supply device and an image forming apparatus, capable of always maintaining a constant pickup force regardless of the amount of loaded sheets of paper. The paper supply device includes a paper supply cassette, a pickup unit to pick up the paper, a paper supply plate and a press spring to bias the paper toward the pickup unit, a first restraining device to restrain the paper supply plate and to release the restraint of the paper supply plate, a second restraining device to permit the pickup unit to move vertically when the pickup unit picks up the paper and restricts the vertical movement of the pickup unit when the pickup unit does not pick up the paper, and an elastic member to bias the pickup unit toward the paper to provide the pickup unit with a pickup force when the pickup unit picks up the paper.

Abstract: A pressing projection of a paper feeding cassette presses a push-back mechanism to thereby release urging of a cam gear in a direction opposite to a direction of the paper feeding cassette. The cam gear moves in the direction of the paper feeding cassette. A cam of the cam gear rotates a rotation lever. The rotation lever rotates a pickup roller lifting and lowering shaft. The pickup roller lifting and lowering shaft lowers a pickup roller.

Abstract: A sheet material feeding apparatus has a rotatable pressure plate for stacking sheet materials, a pickup roller for feeding the sheet material stacked on the pressure plate, a feed roller for feeding the sheet materials fed by the pickup roller and a separation roller contactable with the feed roller. A registration roller corrects oblique feeding of the sheet material by being abutted against the separated sheet material by the feeding roller and the separation roller, and after the registration roller rotates in synchronism with the pickup roller and the feed roller to start feeding the sheet material, pressure of the pressure plate against the pickup roller is released, and thereafter the feed roller and the separation roller are spaced apart from one another.

Abstract: In the image reading and recording apparatus, a separating and feeding unit, a paper end detecting unit, a reading unit, a conveying unit, and a recording unit are arranged in this order from the upstream of the conveying direction. The separating and feeding unit has a switching unit for selectively switching between a separating function of separating the uppermost one of stacked sheets and a feeding function of feeding each separated sheet at a predetermined speed. After a sheet is separated, switching from the separating function to the feeding function is carried out before the paper end detecting unit detects the top end of the sheet.

Abstract: This invention is related to a feeder for transporting a print medium from a tray along a U-shaped transporting path. The feeder includes a movement member coupled to a feeding roller. The movement member includes a first portion located at a position such that the print medium makes contact with the first portion when a transporting roller and the feeding roller simultaneously make contact with the print medium. The first portion receives a force from the print medium when the first print medium makes contact with the first portion. The movement member moves the feeding roller by utilizing the force such that a distance between the feeding roller and the support surface of the tray increases.

Abstract: A sheet feeding device includes a setting roller, a motor, a flag, a setting guide, a setting-guide swinging device, and a locking mechanism. The motor generates a driving force to rotate the setting roller. The flap swings between a standby position and a feeding position, and, when at the standby position, does not allow transport of a sheet. The setting guide swings between a standby position and a feeding position, and, when at the standby position, separates a sheet from the setting roller. The setting-guide swinging device swings the setting guide using the driving force from the motor. The locking mechanism prevents the flap from swinging to the feeding position when the flap and the setting guide are in the respective standby positions.

Abstract: A sheet feeder has a tray for receiving one or more media sheets. An arm is configured to pivot relative to the tray. A roller is rotatably coupled to the arm. A biasing device is coupled to the arm. The biasing device biases the arm to pivot toward the tray.

Abstract: A feeding apparatus, includes: a housing part which houses stacked sheets and has, a separating part which separates said sheets one by one; an arm member which is capable of pivoting about its one end, in accordance with the amount of said stacked sheets; and a first feeder rotating body disposed far from said one end and a second feeder rotating body disposed closer to said one end than is said first feeder rotating body, which are mounted to said arm member, abut on a top surface of said sheets, and separate and feed said sheets one by one while cooperating with said separating part. Which of said first feeder rotating body and said second feeder rotating body abuts on the top surface of said sheets depending on the amount of said stacked sheets.

Abstract: An over-stack protective portion is provided on a stopper member. When a sheet feeding device is in a standby position, the over-stack protective portion is held in a position in which the over-stack protective portion is in pressure contact with sheets having the maximum stacking height capable of being fed and supported by a sheet supporting portion. Also, when the sheets are to be fed, the pressure contact of the over-stack protective portion with the sheets having the maximum stacking height is released.

Abstract: A feeder unit to feed sheets is provided. The feeder unit includes a main frame, being swingably supported at a pivotal end by a first shaft, and arranged to extend from the first shaft toward an upper level of a tray, a rotary member, which is rotatably supported, and is arranged to come in contact with a topmost surface of the sheets, a pair of opposing walls, formed in the main frame, a secondary frame, having a pair of supporting walls which come to face the opposing walls, a gear train to transmit rotation force to the rotary member, a positioning system to situate the secondary frame in a predetermined position, and a detachment restricting system to restrict the secondary frame from being detached from the main frame. The secondary frame is situated in the predetermined position when the rotary member rotates in a direction to feed the sheets.

Abstract: Embodiments of a pick mechanism for use in an image forming device. In one embodiment, a first mechanism individually moves each of the media sheets from a stack in the input area thereby gradually decreasing a height of the stack. The first mechanism applies a first force profile to the stack while individually moving each of the plurality of media sheets. As the media sheets are moved, the height of the stack gradually decreases from a first height to a second height. As the stack decreases below the second height, a second force profile is applied to the stack. The second force profile is different from the first profile. The first and second force profiles prevent slip as the media sheets are fed from the input area, and also prevent double sheet feeds.

Abstract: In an embodiment of the present invention, a pickup roller R1 makes soft contact to an upper surface of a manuscript by being lowered incrementally in four raising-lowering operations S1 to S4 in which, when an electromagnetic clutch connects, the pickup roller is lowered, while being rotated, to approach the upper surface of the top manuscript and, when the electromagnetic clutch disconnects, the pickup roller, while stopping to rotate, is raised away from the upper surface of the top manuscript by an amount smaller than a lowering amount. Between an electromagnetic clutch-side engaging portion and a pickup roller-side engaging portion of a torque limiter, an elastic member is arranged that suppresses drive power load fluctuation produced by disconnection/connection of the electromagnetic clutch and applies a biasing force in a direction to raise the pickup roller when the electromagnetic clutch disconnects.

Abstract: A paper grabbing assembly is provided. The paper grabbing assembly includes: a base with a pivot seat disposed thereon, wherein the shaft is pivotally disposed on the pivot seat; a bearing plate, pivotally disposed on the base corresponding to the paper grabbing roller; a driven member, connected to one end of the shaft; a cam member and an elastic member, rotatablely fitted on the shaft. The elastic member frictionally contacts the cam member and the driven member respectively, such that the driven member rotates the cam member via the elastic member, for pressing the bearing plate away from the paper grabbing roller. Further, when the cam member is stopped, the elastic member slides relative to the cam member, such that the driven member may not be affected by the cam member, but continue driving the paper grabbing roller to rotate.

Abstract: A media feed system includes a roller and a selectively adjustable biasing system operatively connected to the roller, wherein the adjustable biasing system includes a spring coupled to an adjustable mount, the mount being movable to compress or decompress the spring.

Abstract: Various methods and apparatus are disclosed separating sheets of media.

Abstract: A media pick assembly has a media tray for retaining a stack of media in a peripheral device, an auto-compensating mechanism disposed adjacent to the media tray, the auto-compensating mechanism movable through an operating range including a starting angular position and an ending angular position, and a media biasing member engaging the auto-compensating mechanism and providing a discontinuous force on the auto-compensating mechanism through the operating range.

Abstract: A supporting member is swingable about an imaginary swing axis that is parallel to an imaginary rotational axis of a feeding roller. The imaginary swing axis is located above a recording medium accommodated in a recording-medium accommodating section and is located upstream in a feeding direction of the recording medium with respect to the imaginary rotational axis. A first urging member is configured to apply an urging force to the support member in such a manner that the feeding roller contacts the recording medium accommodated in the recording-medium accommodating section. A second urging member is configured to urge an end of the supporting member in a direction that increases the urging force of the first urging member when an angle between a surface of the recording medium and a plane containing both the imaginary rotational axis and the imaginary swing axis is smaller than a predetermined angle.

Abstract: A conveying apparatus for conveying a flexible sheet along a sheet-convey path including a curved portion. The conveying apparatus includes an outer guide which defines an outer portion of the curved portion of the sheet-convey path. The outer guide includes a guide base including a recessed portion; at least one guide roller including a roller body and a pair of shaft portions that are formed integrally with the roller body; and a curved plate having a first curved guide surface which guides the flexible sheet, and including at least one bearing portion which bears the at least one guide roller such that a portion of the roller body projects inward from the first curved guide surface and the roller body is rotatable about axis of the shaft portions. The recessed portion of the guide base holds the curved plate such that the shaft portions of the at least one guide roller extend in a widthwise direction of the sheet-convey path.

Abstract: A sheet feeder includes a feed roller feeding a sheet while rotating in a feeding direction, a driving gear that rotates in a predetermined direction and transmits a driving force, a first gear mechanism transmitting the force to the feed roller to rotate the feed roller in a reverse direction opposite to the feeding direction, and a second gear mechanism transmitting the force to the feed roller to rotate the feed roller in the feeding direction. The driving gear includes a first engaging member that engages with the first gear mechanism and transmits the force to the first gear mechanism at a rotational angle of the driving gear within a first range, and a second engaging member that engages with the second gear mechanism and transmits the force to the second gear mechanism at the rotational angle within a second range having no common range with the first range.

Abstract: An automatic document feeding (ADF) device includes a document feed tray wherein documents are stacked, a shaft rotatably disposed on the document feed tray, an automatic document feeding roller rotatably coupled to the shaft and transporting the documents one by one, a bracket rotatably coupled to the shaft, a pick-up roller rotatably coupled to the bracket and picking up the documents stacked on the document feed tray by using a rotating force received from the shaft, a document stopper disposed to be able to rotate about the same axis as the pick-up roller rotates about and limiting a movement of the documents stacked on the document feed tray, a latch arm locking the document stopper to limit the movement of the documents and prevent the document stopper from rotating, and a flag rotatably coupled to the shaft and pushing the latch arm to unlock the document stopper.

Abstract: A feeding tray is detachably mounted on a base member and includes a bottom portion. The bottom portion has a first side that is configured to hold a recording sheet and a second side opposite the first side. An image forming unit forms an image on the recording sheet. A feeding roller is configured to rotatingly contact the recording sheet held in the feeding tray, thereby feeding the recording sheet toward the image forming unit in a conveying direction. A roller arm has one end that rotatably supports the feeding roller and another end opposite the one end. The roller arm is configured to swing about the another end, thereby generating a pressing force for pressing the feeding roller against the recording sheet. A supporting member is provided at the second side of the bottom portion and is configured to support the bottom portion against the pressing force.

Abstract: A sheet feeder includes; a sheet feed roller that abuts against a topmost sheet of stacked sheets and rotates to convey the topmost sheet in a conveyance direction; an arm spanning across a drive shaft and the sheet feed roller; a rotating transmission member that transmits rotation of the drive shaft to the sheet feed roller, wherein the arm is provided with a cantilever shaft that supports the rotating transmission member, and an elastic member that faces an end face of the rotating transmission member to retain the rotating transmission member in the cantilever shaft.

Abstract: An image forming apparatus capable of preventing simultaneous delivery of two sheets of paper when they are supplied from a paper supply device, thereby improving operational reliability of the paper supply device. The image forming apparatus includes a body incorporating a printing device, a first paper supply unit, in which first paper is loaded, a second paper supply unit, on which second paper is disposed, at least one feed roller to deliver the second paper disposed on the second paper supply unit, a pickup roller to pick up the first paper from the first paper supply unit, and a pickup pad, which is located at a first position to contact the pickup roller when the pickup roller picks up the first paper from the first paper supply unit, and which is located at a second position spaced apart from the pickup roller when the second paper disposed on the second paper supply unit is delivered by the feed roller.

Abstract: A sheet supplying device has: a base; a tray; a feed roller provided rotatably at the base and positioned above the tray. When the feed roller rotates while frictionally engaging with a topmost sheet of the stack of sheets, the feed roller can convey the sheet. The sheet supplying device further includes a driving mechanism able to drive the feed roller to rotate; an urging member urging the tray toward the feed roller; a first eccentric cam rotatably provided at the base, and including a large-radius outer peripheral portion and a small-radius outer peripheral portion, the first eccentric cam rotating interlockingly with rotation of the feed roller; and a second eccentric cam rotatably provided at the tray, and including a large-radius outer peripheral portion and a small-radius outer peripheral portion, the second eccentric cam being able to engage with the first eccentric cam.

Abstract: A feeder for an object to be conveyed has an arm having a base end and a distal end and swingable about the base end; a pair of support shafts rotatably provided on both sides of the distal end of the arm; a pair of rotary feeding members for feeding the objects to be conveyed piled in a holder while abutting on the objects to be conveyed, the pair of rotary feeding members being fitted on outer surfaces of the pair of support shafts, respectively; and a regulating unit for regulating orientations of the pair of rotary feeding members uniformly with respect to a direction in which the pair of rotary feeding members rotate, the regulating unit being provided in interfaces between the support shafts and the rotary feeding members.

Abstract: A sheet feeding apparatus including a feeder for feeding sheets stacked up in a sheet stock unit, a leading end regulator for regulating the leading ends in a feeding direction of sheets stacked up in the sheet stock unit, and a driver for moving the leading and regulating member.

Abstract: A recording apparatus includes: a loading section in which a recording medium is set; a feed roller feeding the recording medium set in the loading section; a first urging mechanism urging one of the loading section and the feed roller to decrease a distance between the set recording medium and the feed roller; an edge guide being movable in a width direction of the recording medium to align lateral edges of the recording medium set in the loading section; a DC motor allowing the edge guide to move; and a determination unit determining whether a current value at the time of driving the DC motor reaches a predetermined threshold value. Here, the driving of the DC motor is stopped when it is determined by the determination unit that the current value reaches the predetermined threshold value.

Abstract: A paper-feeding mechanism of an automatic document feeder includes a pick-up module, a supporting module and a paper stopping module. The pick-up module is used for picking an uppermost paper sheet from the stack of paper sheets and transporting the uppermost paper sheet into a passageway inside the automatic document feeder. The supporting module supports the pick-up module and is rotated to either ascend or descend the pick-up module, wherein the supporting module has a sustaining part on a sidewall thereof. When the supporting module and the pick-up module are downwardly rotated, the stopping plate is moved vertically to a paper-feeding position for allowing the uppermost paper sheet to be transported into the passageway. When the supporting module and the pick-up module are upwardly rotated, the stopping plate is moved vertically to a paper-stopping position for hindering the uppermost paper sheet from being transported into the passageway.

Abstract: A paper-feeding system includes a paper tray for positioning a print medium, a pickup roller installed in front of the paper tray for picking up the print medium, a pickup arm connected to the pickup roller including a first retainer, a first elastic component connected to the pickup arm for providing an elastic force to the pickup arm so that the pickup roller can press the print medium, and a swing arm fixed to a shaft at one end. The swing arm includes a second retainer installed at the other end for fixing the first retainer.

Abstract: A shifting mechanism shifts at least one of a sheet accommodating portion and feeding portion, thereby changing a position of the feeding portion relative to sheets. A pressure changing mechanism changes pressure between first and second separating portions. A contact force controlling portion controls the shifting mechanism to provide a first contact force when the feeding portion starts a feeding operation, and controls the shifting mechanism, at a first timing, to reduce the contact force from the first contact force to a second contact force. A pressure controlling portion controls the pressure changing mechanism to provide a first pressure between the first and second separating portions when the feeding portion starts the feeding operation, and controls the pressure changing mechanism, at a second timing, to reduce the pressure from the first pressure to a second pressure while nipping the separated sheet between the first and second separating portions.

Abstract: A document feeder includes a casing, a sheet pick-up module, a stopper and a swing lever. The casing includes a sheet feeding channel therein. The sheet pick-up module is pivotally mounted above the sheet feeding channel, and movable between a sheet feeding position and a standby position. The stopper is disposed under the sheet feeding channel. The swing lever includes a first end part is pressed down by the sheet pick-up module and a second end part is pressed down by the stopper. When the sheet pick-up module is switched from the sheet feeding position to the standby position, the sheet pick-up module depresses the first end part of the swing lever, so that the stopper is raised by the second end part of the swing lever to be protruded to the sheet feeding channel.

Abstract: A feeder and a multifunction printer using the same are provided. The feeder for moving a piece of paper includes a base, a housing, a cover and a driving mechanism. The base has a first surface for supporting the paper. The housing includes a frame and a holder. The frame is disposed over the base and has an opening that exposes part of the first surface. The holder for holding the paper is disposed over the frame, and a containing space is formed between the holder and the first surface. The cover is laid over one side of the housing. The driving mechanism is for driving the paper so as to move the paper from the holder to the first surface.

Abstract: When a paper feed cassette is again mounted, a pressing portion of a pressing member is brought into contact from the front side on a second surface of an extending portion of a contacting member, and the contacting member is pressed by the pressing member to be displaced from the retract position to the contact position. At this time, the pressing portion of the contacting member presses a pressed portion of a disc member to rotate a third cam itself in the counterclockwise direction in the drawing. Accordingly, the lift lever locked by the third cam is released, and an end portion of an arm member is allowed to move upward.

Abstract: A bypass tray to be used in an image forming apparatus, the bypass tray including a knock-up plate resiliently biased in an upward direction; and at least one stopper provided at least one side of the knock-up plate, rotatably provided so as to restrict a position of the knock-up plate while moving up and down.

Abstract: When a paper feed cassette is again mounted, a pressing portion of a pressing member is brought into contact from the front side on a second surface of an extending portion of a contacting member, and the contacting member is pressed by the pressing member to be displaced from the retract position to the contact position. At this time, the pressing portion of the contacting member presses a pressed portion of a disc member to rotate a third cam itself in the counterclockwise direction in the drawing. Accordingly, the lift lever locked by the third cam is released, and an end portion of an arm member is allowed to move upward.

Abstract: A paper feeding device comprises an upper frame, a pickup roller assembly connected to the upper frame and a lower frame. The pickup roller assembly includes a roller frame, a separating roller, a pickup roller, and a belt sleeved on both the separating roller and the pickup roller. The separating roller and the pickup roller are connected to the roller frame. The belt impels the separating roller and the pickup roller to press against the roller frame. When the separating roller rotates, the friction created between the separating roller and the roller frame and the friction created between the pickup roller and the roller frame drives the pickup roller assembly to rotate, then the paper is fed into the paper feeding device. The structure of the paper feeding device is simple and the cost is lower than the conventional one, moreover, it is convenient to assemble.

Abstract: A sheet conveying apparatus, an automatic draft conveying apparatus, a paper feeding apparatus, and an image forming apparatus capable of preventing self-oscillation of a conveying roller. When rigidity of an oscillation system of the conveying roller is K [N/m], the distance between a supporting point of an arm and a section of the arm to which an axis of the conveying roller is attached is L [mm], and arm angle, which is formed between a sheet and a line segment connecting the supporting point of the arm to the section of the arm to which the axis of the conveying roller is attached on an assumed plane perpendicular to a direction of the axis of the conveying roller, is ? [deg], ??(Pse×K?0.5)×(1/L) is satisfied, where Pse=37500.

Abstract: A document feeder for feeding a plurality of paper sheets one by one includes an engaging module and a detachable roller module. The detachable roller module is detachably mounted on the engaging module and includes a frame, a paper separation roller axel, a fixing element and a paper separation roller. The paper separation roller axel is supported on the frame. The fixing element is pivotally coupled to the paper separation roller axel for positioning the detachable roller module on the engaging module. The paper separation roller is disposed within the fixing element and sheathed around the paper separation roller axel.

Abstract: An image forming apparatus having a paper pickup unit includes a power unit to drive a shaft of the paper pickup unit, wherein the paper pickup unit includes a pressing plate at which a recording medium, such as a sheet of paper, is stacked, a paper feed unit body to receive the pressing plate, a shaft rotatably mounted on a front end of the pressing plate, a pickup roller to rotatably engage the shaft to pick up the recording medium stacked on the pressing plate, and a guide cam installed at least one side of the shaft and having a shock absorbing part engaged with a guide part installed at the paper feed unit body.

Abstract: A two-way paper pickup system in which both a feed tray and a feed cassette can be used, and a printer adopting the same. The paper pickup system includes a feed tray on which paper or a feed cassette is placed, a first pickup assembly that moves the paper placed on the feed tray, a resistance plate that allows the moved paper to be separately transferred, and a second pickup assembly that is moved to a paper exit of the feed cassette so as to move paper included in the feed cassette when the feed cassette is placed on the feed tray. When the feed cassette is inserted into the printer, the first pickup assembly is moved on the feed cassette while being rotated.

Abstract: A feeding device is provided including a stacking portion on which a plurality of recording media are stacked, a feed roller that feeds the recording medium stacked on the stacking portion, biasing means for applying biasing force to either the stacking portion or the feed roller to thereby decrease the distance between the stacking portion and the feed roller, and biasing force adjustment means for adjusting the magnitude of the biasing force of the biasing means.

Abstract: A paper-feeding device of an image forming apparatus and an image forming apparatus having the same include a paper-feeding cassette detachably mounted to a mounting section of a paper-feeding cassette in a body of the image forming apparatus, including a loading portion with plural sheets of paper and a front panel connected to the loading portion by a sliding member, a pick-up device provided at one side of the mounting section of the paper-feeding cassette, a pick-up bracket rotatably connected to a frame at an upper side of the mounting section and rotating around a rotating shaft, with one end of the pick-up bracket being connected to the pick-up device, and a pick-up controller operating in cooperation with the front panel when the paper-feeding cassette is mounted and removed to and from the mounting section, respectively.

Abstract: A sheet feeder device is provided with a pick-up roller driving section which is operative to position the pick-up roller into a retracted position spaced a predetermined distance apart from a stack of document sheets on a document tray before and after the operation for feeding the series of document sheets, into a sheet feed position in which the pick-up roller abuts against the stack of document sheets for feeding the document sheets at an occasion of feeding of each of the document sheets in the operation for feeding the series of document sheets, and into the standby position above and close to the height of a stack of a maximum load number of document sheets carried on the document tray during a period from a point in time just after feeding of one sheet to a point in time just before feeding of a succeeding sheet.

Abstract: A recording medium feeder includes: a tray on which a plurality of recording medium are to be stacked; a feed roller that feeds the recording medium stacked on the tray; a first friction member provided on the tray and having high friction coefficient; and a second friction member provided on the tray at a position opposing the feed roller and having low friction coefficient that is lower than the friction coefficient of the first friction member, wherein the first friction member is configurable to be in one of positions of a protruded position in which a surface of the first friction member is protruded from a surface of the second friction member towards the feed roller and a retracted position in which the surface of the first friction member is arranged to be not higher than the surface of the second friction member.

Abstract: A device and method for moving media sheets within an image forming apparatus. The device includes a motor; a pick mechanism operatively connected to the motor, a first gear set having a first ratio and operatively connecting the motor to the pick mechanism, a feed nip operatively connected to the motor to receive the media sheet and forward the media sheet along a media path, and a second gear set having a second gear ratio and operatively connecting the motor to the feed nip. The motor may operate at a constant speed and drive the pick mechanism at a first speed and the feed nip at a second speed. The first and second speeds may be the same, or the speeds may be different.

Abstract: A paper feeding device includes a cover, a base, a pickup roller assembly and at least one paper blocking unit. The paper blocking unit is placed beside the pickup roller assembly, has a paper blocking element and a projection projecting from the upper portion of the side wall of the pickup roller assembly. The paper blocking element includes a connecting portion, a paper blocking arm, a pivot rotatablely connecting the cover. A connecting arm extends upwards from the end of the pivot, a blocking portion projects from the outer side of the connecting arm, a passage is formed between the blocking portion and the connecting arm. The projection can be downward against the blocking portion of the paper blocking element or pass through the passage of the paper blocking element to allow the paper to be fed in, so the cooperation is easy, the paper feeding device works smoothly.