Collapsible Metal Tubes

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  • Collapsible metal tubes from which a paste stored therein is squeezed when the body portion is subject to plastic deformation by pressure have been used to store various drugs and cosmetics.

  • In 1841 the American portrait painter John Goffe Rand invented the squeezable or collapsible metal tube.

  • It comprises a body portion composed of metal walls susceptible of plastic information, and a shoulder portion and neck portion connected to one end of the body portion. The other end of the body portion of the collapsible metal tube is sealed by folding and tightening and neck portion is openably closed with a cap.

  • Collapsible tubes made of tin, tin alloy or aluminium as they are commonly used for containing and delivering liquid, viscous or pasty products such as tooth pastes are generally fitted with a lid so as to be perfectly air tight while they are prepared for use, transported, stored in ware houses in markets or shops.

  • The collapsible metal tube, or the "compressible" tube, as it was sometimes called, had been around for quite a few years.

  • The majority of medical creams and ointments are marketed in collapsible tubes made from aluminium or plastics which retain their original shape after use, or special laminates based on aluminium foil.

  • The method for manufacturing the collapsible metal tube comprises: Spray coating a dispersion of fine spherical particles of a metal-adhesive thermoplastic resin on the inside wall surface of a metal body portion open at one end of a collapsible tube comprising the metal body portion plastically deformed without difficulty, and a neck portion connected to the other end of the body portion in this order, to form a coating
    of uniform thickness and heating the coating to fuse the fine spherical particles of the resin, thereby forming a metal-adhesive thermoplastic resin layer.

  • A movable plastic insert installed within the neck of a collapsible metal tube is engaged by an inwardly extending protrusion on the underside of the screw cap and is downwardly displaced within the top of the tube when the cap is screwed onto the tube end.

  • A collapsible metal tube adapted to prevent contamination of the product extruded therefrom, comprising a nozzle at one end of the tube, a conduit formed of non-contaminating mouldable conduit formed of non-contaminating mouldable non-metallic plastic material located within nozzle , at least a portion of the outer
    peripheral surface.

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