摘要:
Multi-stage fixing systems for fixing toner to a substrate, printing apparatuses and methods of fixing marking material to a substrate are provided. An exemplary embodiment of the multi-stage fixing systems includes a softening device for softening toner applied to a substrate by a marking device; and a fixing device for fixing the softened toner to the substrate. The fixing device includes a first fixing member including a first surface; a first thermal energy source for actively heating the first surface; and a second fixing member including a second surface, the first surface and the second surface form a fixing nip at which the substrate with softened toner is received. The first fixing member and the second fixing member are operable to apply heat and pressure to the substrate and softened toner received at the fixing nip to fix the toner to the substrate.
摘要:
A printing system is provided for color job matching of the output from a plurality of image marking engines. The system includes a first test image printed by a first image marking engine on a media document. The first test image having a data glyph and a plurality of reference patches. The system further includes a second test image printed by a second image marking engine on the media document. The second test image having a data glyph and a plurality of reference patches. The first and second test images are printed on the same side of the media document. A scanner is provided for scanning the media document. The scanned first and second test images provide calibration data for matching color correction tables of the first image marking engine and the second image marking engine, wherein the data glyph and the reference patches of the scanned image data are compared with retrieved color correction tables for generating compensation values based on a difference between the scanned image set-up data and the color correction tables for at least a first subsequent image document on the first image marking engine or the second image marking engine.
摘要:
An apparatus for loading one or more donor rolls of a developer unit, comprising a developer housing having a reservoir for a developer material, a rotatable first donor roll that delivers the toner onto a moving photoconductive member, a trim roll that receives developer material from the reservoir and delivers the developer material to a first magnetic brush roller that delivers toner to the first donor roll, and a rotatable second magnetic brush roll that receives the developer material from the first magnetic brush roll and delivers the toner to the first donor roll. The apparatus may further comprise a rotatable second donor roll that receives the toner from the second magnetic brush roll and delivers the toner onto the photoconductive member, and a rotatable third magnetic brush roll that receives the developer material from the second magnetic brush roll and delivers the toner to the second donor roll. The apparatus may further comprise a trim blade for trimming excess developer material from the trim roll.
摘要:
A development system for an electrophotographic system including: a magnetic brush roll speed selector for selecting a rotational speed for a magnetic brush roll in a development system of the electrophotographic system; and a controller, responsive to the rotational speed, for adjusting xerographic actuators to maintain DMA within a predefined range.
摘要:
An apparatus which controls the dispensing in mixing of marking particles into a developer unit used in an electrophotograhic printing machine. In particular, the present invention is directed to a developer housing that includes a variable speed mixing apparatus for improving material life and performance. The quantity of marking particles required to reproduce the document is predicted and the dispensing and mixing of marking particles controlled in response thereto.
摘要:
An apparatus for developing a latent image recorded on a surface with toner. The apparatus includes a housing having a supply of toner therein; a donor member arranged in the housing to transport toner to a development zone adjacent the surface; a detaching toner device for detaching toner from the donor member and producing a toner cloud in the development zone; and an air handling system, associated with the housing, for collecting stray toner particles emitted from the housing, the air handling system including a separator for separating toner by size.
摘要:
A corona generating device of the type in which a control grid adjacent a corona generating electrode regulates the charge deposited onto an imaging surface. The control grid defines elongated apertures located in alignment with the electrode, extending along a portion thereof wherein the control grid is adapted to selectively control the charge deposited on the imaging surface area for preventing development of the edge regions thereof.
摘要:
A developer unit for an electrophotographic printer includes a housing defining a chamber for retaining developer material. An auger is rotatable within the chamber for the conveying of developer material within the chamber. The auger and a second rotatable member are adapted to receive rotational drive from a single source of rotational motion. A clutch is responsive to a torque above a predetermined level associated with the auger. A selectably openable outlet port is adapted to permit escape of developer material from the chamber. A linkage is operatively disposed between the clutch and the openable outlet port. A torque above a predetermined level associated with the auger causes the clutch to move the linkage, causing the mechanical linkage to open the outlet port.
摘要:
In an electrostatograhic imaging device of the type forming a multilevel electrostatic latent image on a surface of the imaging member, and developing the multilevel electrostatic latent image with at least two types of toner, and a brush cleaner for removal of toner and debris remaining after transfer of the image to another surface, the brush is maintained in a condition loaded with a first toner type providing abrasive characteristics at the fibers of the brush, for abrading the photoreceptor for removal of toner of said second type.
摘要:
A bead pickoff device for removal of carrier beads adhering to a charge retentive surface subsequent to development of an electrostatic latent image with a developer mix including toner and carrier beads. A stationary magnet member supported within a rotating non-magnetic shell includes a permanent magnet supported in a ferromagnetic strip is provided with first and second sides disposed at an angle in the range of 70.degree. to 110.degree. with respect to each other. The first long side is supported with angled surface free end adjacent the charge retentive surface. The stationary magnet is seated on the second side, spaced from the first. The magnetic field is concentrated in the space between the magnet and the first side to provide an increased bead pickoff force at the charge retentive surface, while the field is attenuated to reduce the force of attraction on the beads as they move away from the charge retentive surface.