| 摘要 |
PCT No. PCT/SE87/00544 Sec. 371 Date May 16, 1989 Sec. 102(e) Date May 16, 1989 PCT Filed Nov. 19, 1987 PCT Pub. No. WO88/03894 PCT Pub. Date Jun. 2, 1988.A method and apparatus for sealing a filled, flanged carton tray with a flat lid. The tray is advanced into a sealing machine while resting on a conveyor (3) and at random spacing between trays. At a predetermined position the tray has a lid (2) placed on it, the lid (2) engaging against a stop curtain (4) and awaiting the tray (1), this being the lid (2) which is to be sealed against the flanges of the tray. The tray with the lid on it is then advanced by rollers (5-8) into a first microwave applicator (11), which includes longitudinal rails (12, 13) with a C-shaped cross section, for sealing a pair of opposing lid edge portions against respective flanges of the tray (1), subsequent to which, compression or sealing rollers (14-17) situated in the advancing direction of the conveyor press against the lid (2), which was sealed immediately previously, and before the tray (1) is turned 90 DEG horizontally for sealing in a second microwave applicator (19) the remaining, opposing parts of the lid (2) against the respective flanges on the tray (1). |
