摘要:
A cutting edge 24 is divided into a center area 28 including a V-shaped apex portion, a pair of intermediate areas 29 on the outer sides thereof, and a pair of side areas 30 on the farther outer sides thereof. The center area 28 has first teeth with the highest tooth height and second teeth with a smaller tooth height, the first teeth being situated at the apex portion and the second teeth being situated between the first teeth at a prescribed spacing around them as the center. A first straight line connecting the tips of the first teeth, a second straight line connecting the tips of the second teeth and a third straight line connecting the bases of the first teeth and second teeth are parallel, the second straight line being located between the first straight line and third straight line. The tips of the intermediate teeth of the intermediate area 29 are located on the second straight line or between the second straight line and third straight line. The tips of the side teeth of the side area 30 are located on the second straight line or between the first straight line and second straight line.
摘要:
A center portion (30) of a V-shaped cutter blade (20) includes center large teeth (31) and center middle teeth 32 the tooth height of which is less than the tooth height of the center large teeth (31). End portions (50) of the cutter blade (20) each include first end teeth (51) and second end teeth (52) the tooth height of which is less than the tooth height of the first end teeth (51). Tooth tops of the first end teeth 51 of each end portion (50) are located on a straight line (L1), which extends through tooth tops of the center large teeth (31) located on one of the right half and the left half of the center portion (30).
摘要:
A toner for developing electrostatic images. having a uniform composition and uniform performances over varying sizes of toner particles is constituted by (a) a binder resin, (b) a long-chain alkyl compound and (c) a specific azo-type iron complex. The long-chain alkyl compound is represented by the following formula (1), (2) or (3): CH3&Parenopenst;CH2&Parenclosest;xCH2OH (1), CH3&Parenopenst;CH2&Parenclosest;yCH2COOH (3), wherein x and y independently denote an average value in the range of 35-150.
摘要:
A toner for developing an electrostatic image is constituted by at least a binder resin and a charge control agent. The binder resin has an acid value of 5-50. The charge control agent comprises an iron complex represented by the following formula: ##STR1## wherein X.sub.1 and X.sub.2 independently denote hydrogen atom, lower alkyl group, lower alkoxy group, nitro group or halogen atom; m and m' denote an integer of 1-3; R.sub.1 and R.sub.3 independently denote hydrogen atom, C.sub.1-18 alkyl or alkenyl, sufonamide, mesyl, sulfonic acid group, carboxy ester group, hydroxy, C.sub.1-18 alkoxy, acetylamino, benzoylamino or halogen atom; n and n' denote an integer of 1-3; R.sub.2 and R.sub.4 denote hydrogen atom or nitro group; and A.sup.+ denotes hydrogen ion, sodium ion, potassium ion or ammonium ion. The toner has a weight-average particle size (D.sub.4) of 4-9 .mu.m and including toner particles having a particle size of 5 .mu.m or smaller at 3-90% by number, toner particles having a particle size of 6.35-10.08 .mu.m at 1-80% by number and toner particles having a particle size of 12.7 .mu.m or larger at a percentage by volume of at most 2.0%, wherein the toner particles having a particle size of 5.0 .mu.m or smaller are contained at N % by number and at V % by volume satisfying a relationship:N/V=-0.05N+k,wherein k is a positive number in the range of 3.0-7.5.
摘要翻译:用于显影静电图像的调色剂由至少粘合剂树脂和电荷控制剂构成。 粘合剂树脂的酸值为5-50。 电荷控制剂包括由下式表示的铁络合物:氢原子,低级烷基,低级烷氧基,硝基或卤素原子; m和m'表示1-3的整数; R1和R3独立地表示氢原子,C1-18烷基或烯基,磺酰胺,甲磺酰基,磺酸基,羧基酯基,羟基,C1-18烷氧基,乙酰氨基,苯甲酰氨基或卤素原子; n和n'表示1-3的整数; R2和R4表示氢原子或硝基; A +表示氢离子,钠离子,钾离子或铵离子。 调色剂的重均粒径(D4)为4-9μm,包括粒径为5μm以下的调色剂颗粒为3-90%,调色剂颗粒的粒径为6.35-10.08 以数量为1-80%的粒径和粒径为12.7μm或更大的调色剂颗粒,其体积百分比至多为2.0%,其中粒径为5.0μm或更小的调色剂颗粒包含在 N%数,体积V%满足关系:N / V = -0.05N + k,其中k为3.0-7.5范围内的正数。
摘要:
A magnetic toner comprises a binder resin and a magnetic material.The magnetic toner has a volume average particle diameter of not more than 9 .mu.m and the variation coefficient of particle size distribution, (.sigma.T/D).times.100, of the magnetic toner satisfies the following condition:25.ltoreq.(.sigma.T/D).times.100.ltoreq.35where D represents a volume average particle diameter (.mu.m) of the magnetic toner and .sigma.T represents a value of standard deviation of the volume particle size distribution of the magnetic toner,The magnetic material has a number average particle diameter of from 0.1 .mu.m to 0.2 .mu.m and the variation coefficient of particle size distribution, (.sigma./X).times.100, of the magnetic material satisfies the following condition:(.sigma./X).times.100.ltoreq.40where X represents a number average particle diameter (.mu.m) of the magnetic material and .sigma. represents a value of standard deviation of the number particle size distribution of the magnetic material.
摘要:
A toner for developing electrostatic images, comprises a binder resin and a colorant, wherein the binder resin comprises a vinyl copolymer having an acid anhydride group, and the binder resin has a total acid value (A) of 2-100 mgKOH/g and a total acid value (B) attributable to acid anhydride group of below 6 mgKOH/g so that [(B)/(A)].times.100 is 60% or less. Because the binder resin has a specified acid value partly attributable to acid anhydride group, the toner is provided with an adequate balance between chargeability and dischargeability, so that the toner shows a stable performance under various environmental conditions. The toner is particularly advantageously constituted as a magnetic toner of fine particle sizes suitably used under application of unsymmetrical alternating bias electric field.
摘要:
A toner for developing electrostatic images, comprises a binder resin and a colorant, wherein the binder resin comprises a vinyl copolymer having an acid anhydride group, and the binder resin has a total acid value (A) of 2-100 mgKOH/g and a total acid value (B) attributable to acid anhydride group of below 6 mgKOH/g so that [(B)/(A)].times.100 is 60% or less. Because the binder resin has a specified acid value partly attributable to acid anhydride group, the toner is provided with an adequate balance between chargeability and dischargeability, so that the toner shows a stable performance under various environmental conditions. The toner is particularly advantageously constituted as a magnetic toner of fine particle sizes suitably used under application of unsymmetrical alternating bias electric field.
摘要:
A toner having a negative triboelectric chargeability and suitable for developing positively or negatively charged images is composed of at least a binder resin, a colorant and an organic metal compound. The organic metal compound is an organic zirconium compound comprising a coordination or/and a bonding of zirconium and an aromatic compound as a ligand or/and an acid source selected from the group consisting of aromatic diols, aromatic hydroxycarboxylic acids, aromatic monocarboxylic acids, and aromatic polycarboxylic acids.
摘要:
A toner for developing electrostatic images comprises,(i) a binder resin,(ii) a colorant, and(iii) a compound made by a reaction of a monohydroxylic compound having a long-chain alkyl group having an alkylene group with 40 or more carbon atoms and a hydroxyl group with a carboxylic acid having a molecular weight of 1,000 or less, or a compound made by a reaction of a monocarboxylic compound having a long-chain alkyl group having an alkylene group with 40 or more carbon atoms and a carboxyl group with an alcohol having a molecular weight of 1,000 or less.
摘要:
A toner for developing an electrostatic image has a binder resin and a colorant.The binder resin contains a polyester resin at least part of which has a long-chain alkyl group having 22 to carbon atoms and has a hydroxyl group or a carboxyl group at its terminal.