| 摘要 |
<p>1,223,364. Cutting apparatus. RICOH, K. K. 11 March, 1969 [19 March, 1968], No. 12822/69. Heading B4B. A cutting apparatus for sheet material, e.g. a photocopying machine, comprises a rotatable cutter blade 4, a stationary cutter blade 8 having a curved cutting edge which is inclined to the direction of feed of the sheet and which lies along the cylindrical surface generated when the rotatable cutter blade is rotated, and means for maintaining the peripheral speed of the cutting edge of the rotatable blade equal to the speed at which a sheet is fed into the apparatus. The cutter blade 4 is mounted on a shaft 2 which is rotated, via a gearing 28, 29, 30, 31, 32, by means of a driven feed roller 24; the feed roller 24 together with a second feed roller 25, are driven by means of a roller 27 via a belt 26. The gear train is such that the peripheral speeds of the feed rollers 24, 25 and the edge of the blade 4 are equal. The gear 32 is coupled to the shaft 2 through an electromagnetic clutch. The blade 8 is mounted on a pivoted shaft 11 and may be adjusted in relation to the blade 4 by means of a screw 17 acting against springs 14, 15. In operation, when a sheet is fed between guide plates 19, 20 a measuring device is operative which then actuates the electromagnetic clutch so that the blade 4 rotates to cut the sheet. In a modification, the blade 8 can be made thin in order to resiliently contact the blade 4, thereby dispensing with the springs 14, 15.</p> |
