摘要:
A method and apparatus for deskewing a sheet of media traveling through a paper path in a printer is provided. A buckle is formed in the sheet of media by over-driving the sheet into stationary deskew rollers that form a deskew nip downstream. A deskewing bias element includes a plurality of articulated segmented surfaces that contact the buckle and urge the leading edge of the sheet into the deskew nip. The buckle force combined with the biasing force from the deskewing bias element aligns the leading edge of the sheet with the deskew nip across the full width of the sheet, thereby removing any skew.
摘要:
The present invention provides a sheet feeding apparatus, comprising a pair of rotary convey members (101, 102), and control means (121) having a first mode in which a sheet (105) fed in a predetermined direction is pinched between the pair of rotary convey members (101, 102), the sheet (105) is then fed in a reverse direction, a leading end of the sheet is then abutted against a nip between the rotary convey members (101, 102), and then the sheet (105) is fed in the predetermined direction, and a second mode in which the fed sheet (105) is further fed to the predetermined direction by the pair of rotary convey members (101, 102) without returning the sheet (105) and adapted to control the pair of rotary convey members (101, 102) to feed the sheet (105) in either the first or second mode.
摘要:
A method for aligning print media (310) on a feedpath (370) includes the steps of: aligning a sheet of print media using a deskew mechanism (300); measuring the skew (420) of the sheet after it has been aligned; and comparing the measured skew with a specified skew (430), and if the measured value is greater than the specified value, reversing the sheet (440) through the deskew mechanism followed by repeating the aligning, measuring and comparing steps. An apparatus for implementing alignment of print media on a feedpath comprises a deskew mechanism and sensors (346, 347, 348, 350, 352, 354, 356, 357 and 358) positioned downstream on the feedpath from the deskew mechanism to provide data sufficient to calculate the skew of the sheet.
摘要:
Sheet feeder (1) with a receiving roll (11) for bringing a sheet (3) from a sheet stack receptacle (31) into a sheet path (32), a conveyor roll (12) for forwarding the sheet (3) and a sheet deflector (2) arranged in the sheet path (32) between the receiving roll (11) and the conveyor roll (12), the sheet deflector (2) being arranged so as to be movable toward a prestress element (21).
摘要:
The present invention provides a recording system, comprising recording means (201) for recording an image on a sheet (206) in response to image information at a recording position, first rotary convey member (218, 219) disposed at an upstream side of the recording position in a sheet feeding direction, second rotary convey member (220, 221) disposed at a downstream side of the recording position in the sheet feeding direction, and control means for controlling the first rotary convey member (218, 219) in such a manner that a feeding speed of the first rotary convey member (218, 219) becomes slower than a normal feeding speed within a predetermined range before and after a trailing end of a sheet (206) passes through the first rotary convey member (218, 219).
摘要:
The present invention provides a recording system, comprising recording means (201) for recording an image on a sheet (206) in response to image information at a recording position, first rotary convey member (218, 219) disposed at an upstream side of the recording position in a sheet feeding direction, second rotary convey member (220, 221) disposed at a downstream side of the recording position in the sheet feeding direction, and control means for controlling the first rotary convey member (218, 219) in such a manner that a feeding speed of the first rotary convey member (218, 219) becomes slower than a normal feeding speed within a predetermined range before and after a trailing end of a sheet (206) passes through the first rotary convey member (218, 219).
摘要:
The present invention provides a recording apparatus comprising convey means for conveying a sheet in a predetermined convey direction, a pair of rollers arranged downstream of the convey means in the convey direction for conveying the sheet in the convey direction or in an opposite direction by their rotations in a normal direction or in a reverse direction, and control means for controlling the convey means and the pair of rollers, Control means control them in such a manner that, after the sheet conveyed by the convey means is conveyed in the convey direction by a predetermined amount by the pair of rollers, the pair of rollers are rotated in the reverse direction while applying a conveying force in the convey direction to the sheet by the convey means, thereby conveying the sheet in the opposite direction until the sheet passes through a nip between the pair of rollers.
摘要:
A device for conveying and positioning sheets, comprising positioning means (35) for positioning one of the longitudinal sides of the sheets on the ideal transport line (A) for said longitudinal side, the positioning means (35) being adapted to occupy an operative or an inoperative position, and actuating means for moving the positioning means (35), the positioning means (35) comprising a first conveying device (74) and a second conveying device (73) each comprising two conveying members (82, 84; 81, 83) at least one of which is formed by a roller, which two conveying members (82, 84; 81, 83) can form a transport nip extending parallel to the ideal transport line (A), the transport nip of the first conveying device (74) extending on the ideal transport line (A) and the second conveying device (73) being situated at some distance from the first conveying device (74) in the zone of the sheet conveying path, and drive means are provided by which the roller (or rollers) of each conveying device (73, 74) can be so driven that each conveying device (73, 74) in its operative position exerts on the sheets a force which is directed towards the other conveying device (74, 73). The effect of this is that one of the longitudinal sides of a sheet is positioned on the ideal transport line (A) for said longitudinal side irrespective of whether the sheet is fed diverging to either side from the ideal transport line (A), the lateral abutment being formed by the transport nip of the first conveying device (74).
摘要:
An image-forming apparatus (100) contains an image-forming portion (10), a first conveying portion (200) that is arranged at an upstream side of the image-forming portion (10) along a sheet conveying direction, a second conveying portion (300) that is arranged at an upstream side of the first conveying portion (200) along the sheet conveying direction and a control portion (50). The control portion (50) controls the first conveying portion (200) to move a pair of registration rollers (210) along a direction that is orthogonal to the sheet conveying direction while the pair of registration rollers (210) nips the sheet when conveying the sheet to the image-forming portion (10). The control portion (50) controls the second conveying portion (300) to move one of the pair of conveying rollers (310) along the direction that is orthogonal to the sheet conveying direction while the pair of conveying rollers does not nip the sheet.