摘要:
A nonflammable binder composition having good properties, such as excellent adhesiveness, flexibility, storage stability and nonflammability, comprises a water-soluble silicate and a vinyl polymer emulsion which is prepared by emulsion polymerization of polymerizable vinyl monomer using, as an emulsifying agent, a neutralization product of water-soluble resin containing carboxyl groups.
摘要:
An image forming apparatus includes an image forming unit, first and second rotary shafts, a drive source to rotate at a predetermined low velocity and a predetermined high velocity, a first rotary transmitter connected between the drive force and the first rotary shaft, a second rotary transmitter connected between the drive force and the second rotary shaft, and a drive block member connected between the drive source and the second rotary shaft to block transmission of the drive force to the second rotary shaft when the drive source rotates at the predetermined high velocity. When the drive source rotates at the predetermined low velocity, the drive source drives the second rotary shaft using a difference in torque between an upper limit in high velocity rotation and an upper limit in low velocity rotation greater than the upper limit in high velocity rotation.
摘要:
A drive transmission system includes a shaft member storing grease in a shaft outer circumferential small diameter section. A drive transmission gear is provided including a gear inner circumferential sliding section and a gear inner circumferential large diameter section. A gear moving device is provided to move the drive transmission gear reciprocally along the shaft member in a shaft direction. A restriction device is provided to restrict a movement range of the drive transmission gear along the shaft member in the shaft direction to enable the gear inner circumferential large diameter section to face the shaft outer circumferential small diameter section substantially continuously.
摘要:
A reciprocating-motion converting mechanism includes a cam that rotates around a rotation center; a reciprocating member that is reciprocated due to rotation of the cam; and a pressing unit that presses the reciprocating member to the cam. A first load torque is generated by a load applied at a point of contact of the cam and the reciprocating motion member. A load applying unit applies a load to the cam to generate a second load torque having a phase substantially opposite to a phase of the first load torque.
摘要:
An improved silicate-phosphate type inorganic coating composition having a long pot life or shelf life is provided which comprises a water soluble silicate or modified silicate and an inorganic phosphate pretreated with such silicate.
摘要:
An image forming apparatus includes an image forming unit, first and second rotary shafts, a drive source to rotate at a predetermined low velocity and a predetermined high velocity, a first rotary transmitter connected between the drive force and the first rotary shaft, a second rotary transmitter connected between the drive force and the second rotary shaft, and a drive block member connected between the drive source and the second rotary shaft to block transmission of the drive force to the second rotary shaft when the drive source rotates at the predetermined high velocity. When the drive source rotates at the predetermined low velocity, the drive source drives the second rotary shaft using a difference in torque between an upper limit in high velocity rotation and an upper limit in low velocity rotation greater than the upper limit in high velocity rotation.
摘要:
Plural auxiliary rotating members abut at different positions in a circumferential direction of a roller-shaped rotating member that is configured to rotate in a forward direction and a reverse direction. Diameters of a portion of the roller-shaped rotating member where a first auxiliary rotating member abuts and a portion of the roller-shaped rotating member where a second auxiliary rotating member abuts are different from each other. Conveying speeds of sheets conveyed by the first auxiliary rotating member and the second auxiliary rotating member with the roller-shaped rotating member in different directions at the same time are different from each other.
摘要:
When starting driving of an agitating unit or a developing roller in an image forming apparatus, rotation speed of one or both of the agitating unit and the developing roller is raised in a stepwise manner until the agitating unit and the developing roller attain a steady rotation speed. When stopping the driving of the agitating unit or the developing roller, the rotation speed is lowered in a stepwise manner until completion of stop of the driving.
摘要:
A powder container, storing powder used for an image forming apparatus, includes a container body, an opening, and a shutter. The opening discharges or introduces the powder, and the shutter opens and closes the opening. The shutter includes a first engaging portion and a second engaging portion. The first engaging portion engages a shutter switch, provided to an apparatus body of the image forming apparatus, in a first trajectory. The second engaging portion engages the shutter switch in a second trajectory different from the first trajectory. The shutter approaches and contacts the shutter switch in the first trajectory or the second trajectory to open and close the opening.
摘要:
A sheet feeder stackable in multiple levels and attachable to an image forming apparatus. The sheet feeder includes a drive source, a drive transmission unit, a first drive coupling unit, a second drive coupling unit, a sheet feed roller, and a grip roller. During operation of multiple sheet feeders stacked in the multiple levels, the drive transmission unit and the first drive coupling unit, both provided to a given sheet feeder of the multiple sheet feeders, are coupled to each other, and the first drive coupling unit of the given sheet feeder is coupled to the grip roller of an adjacent sheet feeder disposed immediately below the given sheet feeder to drive the grip roller of each of the multiple sheet feeders substantially in synchrony.