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42. 发明申请

US20090302531A1 BELTLESS TANDEM-TYPE IMAGE FORMING APPARATUS 有权
标题翻译：唯一的TANDEM型图像形成装置
公开(公告)号：US20090302531A1
公开(公告)日：2009-12-10
申请号：US12388075
申请日：2009-02-18
申请人： Syuichi Katogi , Shoichi Yoshikawa , Fuminori Moro , Takayuki Ito , Masashi Kawai , Noboru Oomoto
发明人： Syuichi Katogi , Shoichi Yoshikawa , Fuminori Moro , Takayuki Ito , Masashi Kawai , Noboru Oomoto
IPC分类号： B65H7/02
CPC分类号： G03G15/0131 , G03G2215/0138 , G03G2215/0158
摘要： In a beltless tandem-type image forming apparatus of the invention, a plurality of pairs of transfer rollers are placed side by side at intervals along a conveying direction of sheets. A control section independently conveys sheets in sequence through nip sections of respective pairs of transfer rollers driven by a driving section while sequentially transferring images formed by an imaging section onto the sheets. Conveying speeds of the respective pairs of transfer rollers controlled by the driving section are gradually decreased for every pair of transfer rollers from an upstream side toward a downstream side along a conveying direction of the sheets, and consequently, a driving period for driving the respective pairs of transfer rollers to convey each sheet is gradually increased for every pair of transfer rollers from the upstream side toward the downstream side along the conveying direction of the sheets. The control section performs control so that an imaging period by the imaging section is synchronized with a driving period by the driving section in every pair of transfer rollers.
摘要翻译：在本发明的无带式串联型图像形成装置中，沿着纸张的输送方向间隔地并排设置多对转印辊。控制部分依次通过由驱动部分驱动的各对转印辊的辊隙部分顺序地输送纸张，同时顺序地将由成像部分形成的图像转印到纸张上。由驱动部控制的各对转印辊的输送速度，对于每对转印辊，沿着纸张的输送方向从上游侧向下游侧逐渐降低，因此，驱动各对的驱动期间沿着纸张的输送方向从上游侧向下游侧的每对转印辊逐渐增加用于输送每张纸的转印辊。控制部进行控制，使得成像部的成像周期与驱动部在每对转印辊中的驱动期间同步。

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