| 摘要 |
PURPOSE:To protect photosensitive sheets and to prevent failure of a vacuum pump by providing means for leaking attraction air to a cushion sheet used for a package of the photosensitive sheets transferred under vacuum attraction respectively in the positions thereof in contact with vacuum suction cups and the positions symmetrical therewith. CONSTITUTION:Respectively at least one piece of the means for leaking the attraction air are provided on the cushion sheet 2 used for the package of the photosensitive sheets 4 which is so formed as to deliver the transferred sheets 4 under vacuum attraction respectively in the positions 3a, 6a thereof in contact with the vacuum suction cups and the positions 3b, 6b symmetrical therewith. The sheet 2 is disposed on the outermost side of the sheets 4 superposed in multiple sheets and protective packing paper 1 is further provided on the outside thereof. The means 3a..., 6a... for leaking the attraction air are constituted of punched holes or recesses into circular, slit or other shapes. These holes or recesses are satisfactory if the holes or recesses are so formed as that the suction cups communicate with the atmospheric air in certain routes to admit the atmospheric air into the suction cups. The sheet 2 is thereby so disposed that the means 3a..., 6a... for leaking the attraction air align to the suction cups even in a dark room by which the failure of the vacuum pump is prevented and the various undesirable influences on the sheets 4 are prevented. |
