Patent GB-638034-A (GB)
Title: Improvements in or relating to jacket-like articles and method of and apparatus for producing same
IPC: A41H42/00
Filed: 1947-08-07
Abstract: <PICT:0638034/IV (a)/1> Jacket-like articles are obtained by applying a layer of a fluid preparation of a film-forming substance on to a continuously advancing flat flexible carrier web, said layer being applied as a flat body of film, applying a relatively non-adhesive substance to the first layer by printing as a flat layer on the first layer so as to leave exposed a marginal portion thereof, applying a second layer of film-forming substance as a flat layer over the exposed portion of the first layer and over the non-adhesive layer, and stripping the layers from the carrier.  A jacket-like article is defined as one comprising at least two sheets of flexible material superposed at least in part, united in at least one area, but separable in at least one area.  It may be a bag, raincoat, tobacco-pouch, glove, tube, envelope, pants, life-belt, or pillow case.  The film-forming substance may be of natural rubber, or synthetic rubber; or a polyvinyl compound such as a vinyl acetate-vinyl chloride copolymer, polyvinyl butyral, vinylidene chloride, or polyvinyl alcohol; or an alkyd resin, or cellulose nitrate.  When a vinyl acetate-chloride polymer is used as the film material, the non-adhesive layer may be polyvinyl butyral. The film-forming compositions and the composition forming the interlayer may be applied in the form of solutions or as aqueous or organic liquid dispersions.  The first layer of film-forming substance may comprise alternate portions shaped to form one wall of a desired article, and interconnecting portions arranged along the carrier and serving to aid in subsequent stripping of the articles from the carrier.  The non-adhesive layer may be applied so that one or more openings are provided in the formed article which, after severing from interconnecting portions, may be turned inside out so that the thickened areas at the junction of the two film-layers are arranged on the inside of the article, as shown in Fig. 13.  The non-adhesive layer may be removed by dissolving it in a solvent which is inert as regards <PICT:0638034/IV (a)/2> <PICT:0638034/IV (a)/3> <PICT:0638034/IV (a)/4> <PICT:0638034/IV (a)/5> the top and bottom film-layers, or it may be removed by peeling, flaking, or brushing. An interlayer which adheres to one of the film layers but not to the other, or two interlayers one of which adheres to the top layer and the other of which adheres to the bottom, both being readily separated from each other, may be used so that the walls of the article may be separated to form a cavity between them.  This separation may be effected by suction applied to the outside, or by forcing air through a hollow needle into the interior.  An interlayer which has some tendency to adhere to the top and bottom layers but which is more elastic than those layers may be used, and in this case, when the article is opened out the interlayer may remain adhering partly to both layers.  If the top and bottom film-layers are joined along one longitudinal side only, the article obtained may be opened out to form a film of twice the width of the component layers.  Still wider sheets may be obtained by superimposing several film-layers and non-adhesive layers so that the film-layers are united longitudinally at alternate sides, the article so obtained being then opened out. The articles may be reinforced with fabric, paper, metal, or other reinforcing material which may be stitched or otherwise secured to the film layers at the place where they are joined to each other. The reinforcing material may serve as the carrier for the film-forming compositions, or it may be laid upon the carrier before the first layer is deposited.  An ornamental appearance may be given to the articles by applying a swelling agent to one or both of the film-layers so as to produce an undulated surface.  As shown in Fig. 1, a carrier web 20 of paper or other material is supplied from roll 21 and wound up on roll 50.  A paper web surfaced with a synthetic resin coating may be used.  The web is drawn by rubber-coated roll 22 and is coated with a film-forming organosol by roll 23.  The film-layer is dried by passage through oven 28, and the carrier with the dried film-layer passes through a set of rollers 35, 37 which apply a relatively non-adhesive substance in the design of the desired article.  The coated carrier then passes through an oven 38 and then through coating rollers 40, 41 which apply a film-forming organosol which is similar to the first or which has a strong affinity for the first layer so that the top film becomes integrally united with the first film at the portions not covered by the interlayer.  The coated carrier then passes through an oven 46 with drying and fusing sections, and the film product is stripped and passed through cutting rolls 51, 52 which cut out the individual jacket-like articles from the film-strip.  The articles 54a fall from roller 52, and the residual film-strip is wound on roll 54. As shown in Fig. 5, the articles formed are raincoats.  To provide the front opening of a raincoat, the upper film is, in a separate operation, cut up the front as shown in Fig. 7.  Instead of casting the first film-layer as a sheet of uniform width, it may be applied by means of an engraved roller in the shape and size of the desired articles with connecting strips as shown in Fig. 14. Specification 650,784 is referred to.