公开(公告)号：US3685254A

公开(公告)日：1972-08-22

申请号：US3685254D

申请日：1970-09-16

申请人： JONATHAN E CURRIER ,  DONALD B WILLIAMS

发明人： CURRIER JONATHAN E ,  WILLIAMS DONALD B

IPC分类号： B65B7/16 ,  B65B7/28

CPC分类号： B65B7/164

摘要： The machine receives open top filled packages (such as trays as one example) placed in side by side nests on an endless conveyor, means being operative to move the conveyor in alternate forward and rest movements, under the forward length of a cover sheet, such as sealing plastic, carried by a roll of the sheet. The nests with their packages are moved by the conveyor under a heated sealing plate, at which point the conveyor rests, and the sealing plate is driven downward into contact with the coversheet area above the packages, and the latter is sealed to the packages, as, for example, to the margins thereof. The sealing plate is then withdrawn upwardly and the packages given an upward movement and into contact with a hot wire cut-off which cuts the marginal edges of the sealed covers from the cover sheet. Then the packages are moved by the machine upwardly to a point above a series of delivery rollers, and pushing means move them so that then by gravity they leave the machine. The conveyor thus moves and rests repeatedly to act repeatedly on each side by side nestheld packages along the length of the conveyor, as to the machine elements thus specified.