| 摘要 |
A sheet delivery arrangement for sheet-fed printing presses which includes a conveyor for depositing sheets one by one upon a delivery platform, front edge and rear edge sheet guides being provided for positioning the sheets as the sheets fall from the conveyor to form an orderly pile. A pair of horizontal guide rails are spaced outwardly from, and a short distance below, the sheet guides and serve to support an auxiliary pile board which is manually inserted into the descending stream of sheets for temporarily intercepting and accumulating the sheets so as to permit removal of the filled delivery platform and substitution of an empty delivery platform. The guide rails include means for camming the auxiliary pile board upwardly into engagement with the rear edge sheet guide incident to the final portion of the insertion movement to insure that the sheets are deposited in accurate position on the auxiliary pile board. The disclosed camming means is in the form of a pair of ramps or wedges located at the rear ends of the guide rails. Preferably, as part of the combination, the front edge sheet guides have springs for biasing the same downwardly into contact with the auxiliary pile board. |
