摘要:
This invention is directed to positively charged developer compositions and toner compositions, the toner composition being comprised of resin particles, pigment particles, and from about 0.1 to about 10 percent by weight of the toner particles of a polymeric charge enhancing additive of the following formulae: and wherein a and b are percentage numbers equaling 100, a being from about 20 weight percent to about 99 weight percent, and b being from about 80 weight percent to about 1 weight percent, n is a repeating number ranging from about 3 to about 300, Z is an oxygen atom, c is the number zero or 1, Y is an alkyl or aromatic radical, Z' is selected from the group consisting of aliphatic, aromatic, and heterocyclic radicals, R,, R 2 , R 3 and R 4 are independently selected from alkyl radicals containing from about 1 to about 22 carbon atoms, X is an anion, a' is a number of from about 50 to about 500, R 1 ' is hydrogen or an alkyl radical containing from 1 to abut 22 carbon atoms, as well as methods of developing electrostatographic images utilizing such compositions.
摘要:
This invention is directed to positively charged developer compositions and toner compositions, the toner composition being comprised of resin particles, pigment particles, and from about 0.1 to about 10 percent by weight of the toner particles of a polymeric charge enhancing additive of the following formulae: and wherein a and b are percentage numbers equaling 100, a being from about 20 weight percent to about 99 weight percent, and b being from about 80 weight percent to about 1 weight percent, n is a repeating number ranging from about 3 to about 300, Z is an oxygen atom, c is the number zero or 1, Y is an alkyl or aromatic radical, Z' is selected from the group consisting of aliphatic, aromatic, and heterocyclic radicals, R,, R 2 , R 3 and R 4 are independently selected from alkyl radicals containing from about 1 to about 22 carbon atoms, X is an anion, a' is a number of from about 50 to about 500, R 1 ' is hydrogen or an alkyl radical containing from 1 to abut 22 carbon atoms, as well as methods of developing electrostatographic images utilizing such compositions.
摘要:
The present invention uses a scavengeless development system in which toner detachment from a donor (42) and the concomitant generation of a controlled toner powder cloud, is obtained by AC electric fields supplied by self-spaced electrode structures (48) positioned within the development nip. The electrode structure is placed in close proximity to the toned donor within the gap between the toned donor and image receiver, self-spacing being effected via the toner on the donor. Such spacing enables the creation of relatively large electrostatic fields without risk of air breakdown.
摘要:
An electrostatographic toner composition comprising resin particles, colloidal silica additive particles, and coloured pigment paticles; and wherein each of the toner particles is encapsulated in a continuous shell from about 1 to about 30 percent by weight of a waxy substance with a molecular weight of from about 500 to about 20,000.
摘要:
An electrostatographic toner composition comprising resin particles, colloidal silica additive particles, and coloured pigment paticles; and wherein each of the toner particles is encapsulated in a continuous shell from about 1 to about 30 percent by weight of a waxy substance with a molecular weight of from about 500 to about 20,000.
摘要:
An electrophotographic printing machine in which a magnetic toner image is transferred to a copy sheet or web (30) from a photoconductive member (12) and fused thereto by a fuser (36). The toner image fused to the copy sheet is magnetized by magnetizing heads (42, 44) and the intensity of the magnetic field generated by the toner image detected by a transducer (46) to provide a continuous indication of the quality of the toner image fused to the copy sheet.
摘要:
An electrostatographic toner composition including a colorant and a resin, the resin being a polyether polymer containing repeating units of the following formula: wherein R is a residue remaining subsequent to the removal of the hydroxyl groups from a dihydric phenol, R" is an aryl or alkyl radical, Z is the residue remaining subsequent to the removal of the hydroxyl groups from an alkylene ether glycol of the formula wherein R' is a hydrogen atom, or methyl, n is an integer having a value of 2 to 4, and m is a number such that the polyether polymer has a reduced viscosity of from 0.2 to 0.6.
摘要:
A full width array spectrophotometer for full width scanning color analysis of color test targets, with one or two substantially linear elongated arrays of closely spaced multiple LED illumination sources of plural different color emissions in a multiply repeated pattern of at least three or four different colors transversely spanning a printer paper path and sequentially illuminated to illuminate a transverse band across a printed sheet moving in the paper path, and a corresponding elongated low cost light imaging bar comprising a parallel and correspondingly elongated array of multiple closely spaced different color sensitive (three or four rows of color-filtered) photodetectors, which imaging bar is positioned to detect and analyze light reflected from the transverse sequentially illuminated band.