Fixing method
AssigneeCanon Kabushiki Kaisha
InventorYasuo Mitsuhashi
Life of this patent
Estimating the term…
Abstract
Fixing method, in which developing powder containing therein vinyl type polymers having at least one molecular peak thereof in the molecular weight regions of 10.sup.3 to 8.times.10.sup.4 and 10.sup.5 to 2.times.10.sup.6, respectively, in a chromatogram measured by the gel permeation chromatography (G.P.C.) is fixed by a fuser roller.
Claims23
A fixing method which comprises fixing a developing powder by means of a fuser roller wherein said developing powder comprises one or more vinyl type copolymers exhibiting a peak value of molecular weight in each of the molecular weight regions of 5.times.10.sup.3 to 8.times.10.sup.4 and 10.sup.5 to 2.times.10.sup.6, respectively, in a chromatogram as measured by gel permeation chromatography, wherein the content of said vinyl copolymers is 30 to 99% by weight with respect to the total weight of the developer powder and further containing an ethylene type olefin homopolymer or ethylene type olefin copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C.
A fixing method which comprises fixing a developing powder by means of a fuser roller wherein said developing powder comprises one or more vinyl type copolymers exhibiting a peak value of molecular weight in each of the molecular weight regions of 5.times.10.sup.3 to 8.times.10.sup.4 and 10.sup.5 to 2.times.10.sup.6, respectively, in a chromatogram as measured by gel permeation chromatography, wherein the content of said vinyl copolymers is 30 to 99% by weight with respect to the total weight of developer powder and further containing an ethylene type olefin homo- or co-polymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C., wherein said developing powder contains 0.1 to 5% by total weight of developing powder of said ethylene type olefin polymer.
A fixing method which comprises fixing a developing powder by means of a fuser roller wherein said developing powder comprises:
- (a) from 30 to 99% by total weight of developing powder of a blend of a vinyl type copolymer P having a molecular weight peak value in the range from 5.times.10.sup.3 to 8.times.10.sup.4 and a vinyl type copolymer Q having a molecular weight peak value in the range from 10.sup.5 to 2.times.10.sup.6, wherein the weight ratio of Q/P is 2/1 to 1/50 and wherein the principal component of the monomers of each of P and Q is identical and,
- (b) from 0.1 to 5% by total weight of developing powder of an ethylene type olefin homo- or copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C.
A developing powder for fuser roller fixing comprising one or more vinyl type copolymers exhibiting a peak value of molecular weight in each of the molecular weight regions of 5.times.10.sup.3 to 8.times.10.sup.4 and 10.sup.5 to 2.times.10.sup.6 respectively, in a chromatogram as measured by gel permeation chromatography and an ethylene type olefin homo- or copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C.
A developing powder for fuser roller fixing comprising one or more vinyl type copolymers exhibiting a peak value of molecular weight in each of the molecular weight regions of 5.times.10.sup.3 to 8.times.10.sup.4 and 10.sup.5 to 2.times.10.sup.6 respectively, in a chromatogram as measured by gel permeation chromatography and in ethylene type olefin homo- or copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C., wherein the content of said vinyl copolymers is 30 to 99% by weight and the content of said ethylene type olefin polymer is from 0.1 to 5% by weight, said weights based on the total weight of the developer powder.
A developing powder for fuser roller fixing comprising:
- (a) from 30 to 99% by total weight of developing powder of a blend of a vinyl type copolymer P having a molecular weight peak value in the range from 5.times.10.sup.3 to 8.times.10.sup.4 and a vinyl type copolymer Q having a molecular weight peak value in the range from 10.sup.5 to 2.times.10.sup.6, wherein the weight ratio of Q/P is 2/1 to 1/50 and wherein the principal component of the monomers of each of P and Q is identical and,
- (b) from 0.1 to 5% by total weight of developing powder of an ethylene type olefin homo- or copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C.
A developing powder for fuser roller fixing comprising:
- (a) from 30 to 99% by total weight of developing powder of a blend of a vinyl type copolymer P having a molecular weight peak value in the range from 5.times.10.sup.3 to 8.times.10.sup.4 and a vinyl type copolymer Q having a molecular weight peak value in the range from 10.sup.5 to 2.times.10.sup.6, wherein the weight ratio of Q/P is 2/1 to 1/50 and wherein the principal component of the monomers of each of P and Q is identical and,
- (b) an ethylene type olefin homo- or copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C.
A process for forming an image comprising the steps of:
- developing a latent image with a developing powder comprising one or more vinyl type copolymers exhibiting a peak value of molecular weight in each of the molecular weight regions of 5.times.10.sup.3 to 8.times.10.sup.4 and 10.sup.5 to 2.times.10.sup.6, respectively, in a chromatogram as measured by gel permeation chromatography and an ethylene type olefin homo- or copolymer having a melt viscosity of 10 to 10.sup.6 cps at 140.degree. C., and
- transferring the image thus developed to an image receiving member.
Dependencies are inferred from the claim text.