| 摘要 |
<p>1304528 Producing skin packages/suction; conveyers STONE CONTAINER CORP 15 Dec 1969 [21 May 1969] 60944/69 Headings B8A and B8C In a packaging machine, a substrate 44 carrying articles to be packaged is passed by a conveyer 46 to a vacuum bed 100a formed by the abutment of a plurality of hollow vacuum platens 59 carried by endless chains, and a heated thermoplastics film 35<SP>1</SP> is drawn on to the substrate 44 by the bed 100a. The platens have perforated upper surfaces 100 and necks 112 which register with a slot 114 in a cylindrical manifold 116 connected to a vacuum pump 118. The film 351 is fed from a roll 35 by means of lines 67 carried by endless chains 61 running in inclined guides 68, and is carried beneath a heater 38 having a reflective hood 80. The movement of the chains 61 is synchronized with that of the conveyer 46, and the substrate is aligned with the film 35 by means of guides 86, both the substrate and the film being guided by guides 96 during movement of the vacuum bed 100a. Completed packages discharged by the vacuum bed are separated by longitudinal and transverse cutters 42, 43. In a modification (Figs. 11-14) each platen (59<SP>1</SP>) has two resiliently mounted necks (112<SP>1</SP>) which register with two slots (128<SP>1</SP>) in the planar upper surface of a rectangular manifold. In this modification the platens (59<SP>1</SP>) forming the bed 100a do not abut, but are separated by gaskets (153).</p> |
