Stock material or miscellaneous articles – Structurally defined web or sheet – Including stitching and discrete fastener – coating or bond
Patent
1989-11-30
1991-12-17
Ball, Michael W.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including stitching and discrete fastener, coating or bond
144346, 144348, 144352, 144381, 156 93, 156148, 156222, 428246, B32B 306, B32B 708
Patent
active
050734318
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method of embodying multi-ply sheets of material with an external ply in quality wood or vegetable tissue, for use in veneering items such as pieces of furniture and in the manufacture of stitched goods, and to a product obtainable by implementation of such a method. The prior art in woodworking embraces the expedient of covering a surface, or an item fabricated from inferior wood or wood-composition board, with a veneer, i.e. a thin dressing of quality wood, to the end of producing a more desirable appearance at reasonable cost.
The materials utilized for veneering consist in thin sheets of wood obtained by sawing, rotary slicing or punching from suitably tough, flexible timbers such as birch or walnut, which are widely selected for the purpose by virtue of their ability to adapt to surfaces often less than totally flat. Before being used, that is, before being applied, veneers are glued to a paper backing and sanded down to a uniform thickness, and given a smooth finish.
Because of the need for toughness and flexibility in veneers, it is practically impossible to make use of certain quality woods (especially burr and figured cuts), and vegetable tissue such as cork; these materials are especially fragile, and often exhibit undulations that cannot be straightened without the veneer breaking up.
Moreover, in the case of manufactured items that require stitching, in particular, personal effects such as bags, wallets and similar accessories in the higher price ranges (i.e. leaving aside the wider area of cheap products fashioned in synthetic materials and aimed at mass consumption), use is made currently of high quality leathers or fabrics. In addition to their flexibility and toughness, the leathers and fabrics used for goods of this type possess other important natural properties, namely mechanical strength, for example along and around stitches, and general durability.
By contrast, quality materials such as burr woods and vegetable tissues (cork), cannot be utilized in this particular field precisely because they do not offer the flexibility, workability and durability of leathers and fabrics; the exact opposite is in fact the case: such materials are ultra-delicate, easily chipped, and at all events, difficult to work to a smooth surface. What is more, stitching will almost invariably tend to tear the material. Accordingly, the object of the present invention is one of embodying sheets of material having one side faced in wood or vegetable tissue, suitable for use in veneering furniture, or in general, for facing items that exhibit a mixed profile with numerous breaks in continuity, and which with additional reinforcement can be exploited in the manufacture of stitched goods without the occurrence of the difficulties aforementioned.
The stated object is achieved by adoption of the method as characterized in the appended claims. Such a method permits of bonding multi-ply sheets of material with an external ply in quality wood or vegetable tissue, and provides for application of the exposed ply to a thin sheet of thermoforming plastic material by way of a layer of hot melt adhesive. In the event of it being wished to invest the laminate with properties such as will enable it to withstand piercing, thus permitting its use in the manufacture of stitched articles, for example personal effects such as bags, wallets and similar matching accessories, the method comprises further bonding of the two-ply sheet, likewise by way of a layer of hot melt adhesive, onto a tough backing fabric impermeable to the adhesive, in such a way as to obtain a strong and durable stitch when sheets are sewn together.
The invention will now be described in detail, by way of example, with the aid of the accompanying drawings, in which:
FIG. 1 is the section through a laminate obtainable by implementation of the method of embodying multi-ply sheets with an external ply in quality wood or vegetable tissue according to the invention;
FIG. 2 is the schematic illustration of a mould used to shape the laminate of
REFERENCES:
patent: 211130 (1879-01-01), Bradley
patent: 2070527 (1937-02-01), Elmendorf
patent: 4205107 (1980-05-01), Jaschke et al.
patent: 4430371 (1984-02-01), Boyes
patent: 4731140 (1988-03-01), Yontrarak
Aftergut Jeff H.
Ball Michael W.
Flexible S.r.l.
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