| 摘要 |
<p>898,642. Portable containers. BROWN, S. Sept. 18, 1959 [July 25, 1958], No. 24068/58. Classes 66 and 94(2). A stiff tubular container is made by applying a layer of thermoplastic material to a layer of stiff material such as card, so as to produce a strip of laminate bendable material, curving the strip into elongate tubular form with the thermoplastic layer inwards, adhering longitudinal edges of the strip to form a tube with a longitudinal join, cutting the tube into short tubes, fitting into one end of each short tube a rigid or semi-stiff closure the exterior peripheral surface of which is composed of thermoplastic material, and applying heat and pressure to weld the closure in the tube. The strip is laminated by bonding thermoplastic material, e.g. polythene, to material such as paper (which may be pre-treated) metal foil or another plastic. The strip is curved into tubular form by known apparatus. The pressure is preferably applied by rollers, which may be heated; as heating may be by highfrequency dielectric means, infra-red ray or hot air. The initial tube is subdivided by known cutting means. On the way from the storage reel to the tube-forming apparatus the strip may be passed through a printing machine. For a collapsible container, the rigid closure may be a shouldered nozzle made of, or coated with, the same thermoplastic material as the tubular body. The closure is bonded to the tube and the container thus formed is filled, after which the other end is flattened and the opposed faces bonded together. For a non-collapsible container end pieces, of plastic, or paper board coated with plastic, may be inserted before and after filling, and bonded. One form of end piece may incorporate a line of weakness for opening; others may include a nozzle, screwed cap, sprinkling perforations and other known adaptations. The tubing material may be chosen as suitable for a container which can be squeezed. The exposed longitudinal edge inside the tubing may be covered, with or after the welding of the longitudinal seam, by a ribbon of thermoplastic material or by the addition of material in liquid form flowed along the edge. Specification 898,641 is referred to.</p> |
