| 摘要 |
<p>1,014,490. Endless conveyers. T. & T. VICARS Ltd. Sept. 16, 1963 [Sept. 28, 1962], No. 36883/62. Heading B8A. [Also in Division B5] A device for intermittently conveying sheet material 24, comprises an endless conveyer 10 lapped about a plurality of guides divided into two groups, one of which is reciprocably displaceable longitudinally of the conveyer 10, relative to the other, at least some of the guides having a clutch mechanism associated therewith whereby some stretches only of the conveyer 10 move forwardly when the movable group of guides is projected whilst other stretches move in a similar sense when that group is retracted. The stationary group of guides comprises two rollers 18, 20 mounted on a frame (not shown) and the movable group comprises a roller 14 and inclined plate 16 mounted on a horizontal plate 12 longitudinally movable by a pneumatic, hydraulic, electrical or mechanical linkage. Upon movement of the plate 12 from the projected position of Fig. 1 to the retracted position of Fig. 2 the rotation of roller 20 or rollers 18 and 20 is prevented by a clutch mechanism and the stretch " X " of the conveyer 10 is drawn over the roller 14 and plate 16 in the direction of arrow " A." Upon movement of the plate 12 back to the projected position, the rollers 18, 20 are rendered freely rotatably by releasing the clutch means but the roller 14 is now prevented from rotating by actuation of a clutch mechanism associated therewith. This results in the upper stretch of the conveyer 10 increasing in length and conveying forwardly the sheet material 24 which in the described embodiment is dough. The latter is fed to the endless conveyer 10 from a constant velocity feed conveyer 28. When the conveyer 10 is in the retracted position, the continuous supply strip of dough forms a loop B between the conveyers and upon being sensed by detectors 30, 32 the drive mechanism for projection of the member 12 is actuated and the loop B is taken up along the upper stretch of the conveyer 10. Further detectors 34, 36 provided below the first set act to stop the drive of the feed conveyer 28 if the dough is sensed by them. A movable knife 26 is mounted above the conveyer 10 and is synchronized to cut the dough when the upper stretch of the conveyer 10 is stationary. The knife is positioned such that the leading edge of each cut piece of dough rests at the lower edge of the inclined plate 16 when the retraction operation starts. During each retraction stroke a cut piece of dough is peeled from the conveyer 10 and is deposited on to a conveyer arranged beneath the device for conveyance longitudinally or transversely to the conveyer 10.</p> |
