| 摘要 |
<p>1397581 Laminating apparatus SEALED AIR CORP 7 June 1972 [8 June 1971] 26437/72 Heading B5N [Also in Division B6] An apparatus for manufacturing laminated cellular material comprises an embossing roller 32, means for feeding a first sheet 22 therearound, heating means 21 which can be moved to and from a position in which said sheet is heated at least in part whilst on said roller, a pressure roller 38 and means to feed a second sheet 33 between said embossing and pressure rollers in contact with said first sheet. As shown in Fig. 1 sheet 22 is coated with adhesive from a trough 28 between rollers 26, 27 and is passed over a drum 30 to the roller 32 before being united with the second sheet. The heater 21 facilitates embossing and is movable along a beam 20. The temperature of the drum 30 and the roller 32 may be controlled by circulating fluid therethrough and vacuum may be applied to the roller 32. In a modification (Fig. 3, not shown) the first sheet is precoated with adhesive and is fed around a large embossing roller which is substantially surrounded along its length by a cylindrical heater movable on a track. Either sheet may be coated with adhesive or barrier or adhesion primer coatings. In Fig. 4, a first sheet 77 is coated with a barrier or primer between rollers 81, 82 and with an adhesive between rollers 88, 89 and a second sheet is coated with a barrier or adhesive between rollers 93, 94. The coatings are dried or activated by passing the sheets over temperature-controlled drums 61, 62, 63 having associated therewith heaters 64, 65, 66 movable on tracks. The efficiency of heating may be improved by a reflector, as at 104. The first sheet is embossed by a roller 73, which with a second embossing roller 73<SP>1</SP> is carried on a pivotable arm 74 to facilitate changing of the embossing roller if necessary. The mechanism for effecting such change is described (Figs. 6-11, not shown) and is claimed in Specification 1,397,582. The sheets are laminated by a pressure roller 100. The embossed sheet may be plastics and the second sheet may be plastics, foil, coated paper or metallized plastics and may be printed with inks. The adhesive may be curable or crosslinkable by heat or may be re-activatable, the latter being necessary if the sheets are precoated. Examples of suitable plastics sheet materials and adhesives are given. Specification 1,096,998 is referred to.</p> |
