Patent ID: 8308288
Filing Date: 2012-11-13
Classification: B41J

Abstract:
1. A medium holding apparatus, comprising: a medium holding device having a plurality of suction grooves through which a recording medium is held by suction; and a suction pressure generating device which is connected to the suction grooves and generates a suction pressure in each of the suction grooves, wherein the medium holding device includes a medium holding body having a body suction groove connected to the suction pressure generating device, and a suction sheet having the plurality of suction grooves, wherein the suction sheet includes a lower layer and an upper layer provided on the lower layer, the lower layer contacts with the medium holding device and has the plurality of suction grooves and restrictor sections connected to the plurality of suction grooves, and the upper layer includes suction apertures, wherein the restrictor sections of the suction sheet are provided in positions corresponding to the body suction groove of the medium holding device, wherein a width of one of the suction grooves that is in a position where the first end portion of the recording medium is held is greater than a width of one of the suction grooves that is in a position where the central portion of the recording medium is held, wherein a length of one of the suction grooves that is in a position where the first end portion of the recording medium is held is shorter than a length of one of the suction grooves that is in a position where the central portion of the recording medium is held, and wherein the suction pressure in one of the suction grooves that holds a first end portion of the recording medium is made stronger than the suction pressure in one of the suction grooves that holds a central portion of the recording medium.