| 摘要 |
1418295 Continuous press for laminating chipboard J KOSTER [trading as WILHELM MENDE & CO] 30 Nov 1972 [12 Jan 1972] 55436/72 Heading B5N Thin chipboard 6 is surfaced with at least one thermoplastic sheet by forwarding the materials on to a heated roller 1 to which they are pressed by a tensioned belt 5 running on support rollers 3, 4 of which the downstream roller 4 is a pressure roller which is movable perpendicular to its axis and preloaded so as to be urged towards the roller 1. In specified assemblies (i) thermoplastic sheets 8, 10 enclose a paper or fabric sheet 9, and (ii) the second thermoplastic sheet 10 is omitted from the assembly (i). The paper or fabric sheet may be printed with a wood pattern and may be melamine-impregnated. Adhesive may be used to bond the sheets. Thermoplastic sheet material should become soft at the exit point from the roller-belt nip, at which point extra pressure is applied by the pressure-roller 4. A belt 14 of low-adhesion material, e.g. p.t.f.e., silicone, may be provided to prevent sticking and is tensioned about a roller 15. The roller 1 and the belt 15 may bear a relief pattern. |
