1. An auxiliary for fine pattern formation comprising a modified polyvinyl alcohol protected with a protecting group, a water-soluble crosslinking agent, and water or a mixed solvent of water and a water-soluble organic solvent, wherein the amount of high-molecular weight body components of the modified polyvinyl alcohol protected with a protecting group, which has a weight-average molecular weight of 250,000 or more as determined by polyethylene glycol standards according to a gel permeation chromatography, is 1000 ppm or less in the modified polyvinyl alcohol.
2. The auxiliary for fine pattern formation according to claim 1, wherein the modified polyvinyl alcohol protected with a protecting group is one that was treated so as to remove acid components and metal ions therefrom.
3. A modified polyvinyl alcohol protected with a protecting group, wherein the amount of high-molecular weight body components having weight-average molecular weight of 250,000 or more as determined by polyethylene glycol standards according to a gel permeation chromatography is 1,000 ppm or less.
4. A method of producing the modified polyvinyl alcohol protected with a protecting group according to claim 3, wherein a solution of the modified polyvinyl alcohol protected with a protecting group is heat-treated at the temperature of 80\xb0 C. or more.
5. The method of producing modified polyvinyl alcohol protected with a protecting group according to claim 4, wherein the solution of modified polyvinyl alcohol protected with a protecting group is heat-treated after a step of removing acid components and metal ions from the solution.
6. The auxiliary of claim 1, where the protecting group is selected from a formyl group, an acetyl group, a malonyl group, a benzoyl group, a cynnamoyl group, a formal group, an acetal group, a butyral group, a t-butoxycarbonyl group and an ethoxyethylene group.
7. The auxiliary of claim 1, where the water-soluble crosslinking agent is selected from melamine derivatives, guanamine derivatives, urea derivatives, glycol uril, and alkoxy alkylated amino resin.
8. The auxiliary of claim 1, where the water-soluble organic solvent is capable of being dissolved at 0.1% by weight or more in water.
9. The auxiliary of claim 1, where the water-soluble organic solvent is selected from alcohols, ketones, esters, ethylene glycol monoalkyl ethers, ethylene glycol monoalkyl ether acetates, propylene glycol monoalkyl ethers, propylene glycol monoalkyl ether acetates, lactic esters, aromatic hydrocarbons, amides, lactones and mixtures thereof.
10. The auxiliary of claim 1, where the modified polyvinyl alcohol protected with a protecting group is heat treated after removing acid components and metal ions from the solution.
11. The auxiliary of claim 1, where the modified polyvinyl alcohol protected with a protecting group is heat treated at a temperature of 80\xb0 C. or more.
12. The auxiliary of claim 2, where the acid components and metal ions are removed using an ion exchange resin.
13. The modified polyvinyl alcohol of claim 3, where the protecting group is selected from a formyl group, an acetyl group, a malonyl group, a benzoyl group, a cynnamoyl group, a formal group, an acetal group, a butyral group, a t-butoxycarbonyl group and an ethoxyethylene group.
14. The modified polyvinyl alcohol of claim 3, where the acid components and metal ions are removed using an ion exchange resin.
15. The modified polyvinyl alcohol of claim 3, where the modified polyvinyl alcohol is heat treated after removing acid components and metal ions from the solution.
16. The modified polyvinyl alcohol of claim 15, where the modified polyvinyl alcohol is heat treated at a temperature of 80\xb0 C. or more.
17. The method of claim 4, where the protecting group is selected from a formyl group, an acetyl group, a malonyl group, a benzoyl group, a cynnamoyl group, a formal group, an acetal group, a butyral group, a t-butoxycarbonyl group and an ethoxyethylene group.
18. The method of claim 4, where the solution of modified polyvinyl alcohol comprises water.
19. The method of claim 5, where the step of removing the acid components and metal ions comprises treating the modified polyvinyl alcohol with an ion exchange resin.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A ribbon protector for attachment to a ribbon cartridge, comprising:
a mounting portion mounted to the ribbon cartridge;
a protecting section opposes an ink ribbon such that the ink ribbon is between said protecting section and the ribbon cartridge when said mounting portion has been mounted to the ribbon cartridge; and
a first projecting portion projecting from said protecting section to incline toward the ribbon cartridge.
2. The ribbon protector according to claim 1, wherein said mounting portion has a first base portion continuous to said protecting portion and said first projecting portion has a second base portion continuous to said protecting section,
wherein the first base portion is thinner than other portions of said mounting portion and the second base portion is thicker than other portions of said first projecting portion.
3. The ribbon protector according to claim 1, further comprising a second projecting portion that projects from said protecting section to incline toward the ribbon cartridge, said first projecting portion inclining more than said second projecting portion.
4. The ribbon protector according to claim 1, wherein said first projecting portion flexes when a force is exerted on said first projecting portion in a direction toward the ribbon cartridge.
5. The ribbon protector according to claim 1, further comprising two elongated holes each having a first part and a second part, the first part being formed in said first projecting portion and a second part being formed beside said protecting section;
wherein said protecting section is between the second part of one of the two holes and the second part of the other of the two holes.
6. The ribbon protector according to claim 1, wherein said first projecting portion has a projection provided thereto, the projection directly facing the ribbon cartridge.
7. The ribbon protector according to claim 1, wherein said first projecting portion is formed of a metal material.
8. A ribbon cartridge having a ribbon protector attached thereto, wherein the ribbon protector comprising:
a mounting portion mounted to the ribbon cartridge;
a protecting section opposes an ink ribbon such that the ink ribbon is between said protecting section and the ribbon cartridge when said mounting portion has been mounted to the ribbon cartridge; and
a first projecting portion projecting from said protecting section to incline toward the ribbon cartridge.
9. The ribbon protector according to claim 8, wherein said first projecting portion has a length that is enough to extend over at least a front support of the ribbon cartridge.
10. The ribbon protector according to claim 8, wherein said projecting portion has a length that is enough to cover substantially half a length of a side support of the ribbon cartridge.
11. A printer incorporating a ribbon cartridge having a ribbon protector mounted thereto so that printhead performs printing on print paper through an ink ribbon supplied from the ribbon cartridge, the print paper is inserted from outside, wherein the ribbon protector comprising:
a mounting portion mounted to the ribbon cartridge;
a protecting section opposes the print paper and the ink ribbon such that the ink ribbon is between said protecting section and the ribbon cartridge; and
a projecting portion projecting from said protecting section to incline toward the ribbon cartridge.
12. The printer according to claim 11, wherein said projecting portion has a length that is enough to extend over at least a front support of the ribbon cartridge.
13. The printer according to claim 11, wherein the printer has an opening through which the print paper is inserted from outside, the opening extending in a longitudinal direction thereof,
wherein said projecting portion extends under the opening, said projecting portion traversing the opening in a direction substantially perpendicular to the longitudinal direction and the print paper is guided by said projecting portion to pass in front of said protecting section.