초록 ▼

A paperboard laminate carbon for containing a liquid product. The innermost and outermost surfaces of the carton are coated with a polymer which is both liquid impermeable and heat sealable. One of the walls of the carton includes an aperture which is fitted with an improved one-piece plastic spout.

A paperboard laminate carbon for containing a liquid product. The innermost and outermost surfaces of the carton are coated with a polymer which is both liquid impermeable and heat sealable. One of the walls of the carton includes an aperture which is fitted with an improved one-piece plastic spout. The spout, prior to installation, includes one preformed flange which contacts one surface of the carton about an aperture in the carton wall. A truncated skirt having a maximum cross-section small enough to pass through the aperture in the carton wall without damaging either the skirt or the carton wall extends from one surface of the preformed flange. A second flange is formed from the truncated skirt after the skirt has been inserted through the aperture in the carton wall. Spout configurations which may be inserted from the exterior or the interior of the carton are disclosed. Because the flange which is formed from the truncated skirt exhibits a minimum cross-section greater than the maximum cross-section of the exterior portion of the spout, heat and pressure can be simultaneously applied to both the exterior and interior flanges in an area where the flanges coincide with one another without subjecting any other portions of the spout and/or resealable closure means to pressure. This permits easy and reliable simultaneous sealing of both flanges to the opposing surfaces of the carton wall in a single step.

대표청구항 ▼

A method for securing a one-piece polymeric pouring spout having a liquid passageway including a discharge orifice and at least one preformed flange oriented substantially perpendicular to said liquid passageway along its length, said preformed flange having a truncated skirt exhibiting a minimum cr

A method for securing a one-piece polymeric pouring spout having a liquid passageway including a discharge orifice and at least one preformed flange oriented substantially perpendicular to said liquid passageway along its length, said preformed flange having a truncated skirt exhibiting a minimum cross-section which is greater than the maximum cross-section of the exterior portion of the spout extending therefrom, in liquid tight relation to the innermost and outermost surfaces of a carton comprised of a laminate material having an intermediate layer comprised of paperboard and an innermost and outermost layer which are substantially impervious to liquid, said method comprising the steps of: (a) cutting a hole of predetermined cross-section in a wall of said carton, thereby exposing said paperboard layer at the edges of said cut hole, said cross-section of said hole being large enough to fully insert said truncated skirt on said preformed flange of said one-piece polymeric pouring spout without damaging either said skirt or said carton wall, yet small enough to be totally blocked by said preformed flange on said pouring spout; (b) inserting said truncated skirt on said preformed flange of said one-piece polymeric pouring spout through said cut hole in said wall of said carton so that said discharge orifice of said spout is on the exterior of said carton; (c) bringing said preformed flange on said pouring spout into contacting relation with said carton wall about the periphery of said cut hole so as to block said cut hole in said carton wall; (d) deforming said truncated skirt extending from said preformed flange of said pouring spout in an outward direction to form a second flange on the opposite surface of said carton wall about said cut hole, said second flange exhibiting a minimum cross-section which is substantially equal to or greater than the maximum cross-section of said pouring spout as measured at any point above said preformed flange and a maximum cross-section which is not only large enough to block said cut hole in said carton wall, but which is also large enough to coincide with at least a portion of said preformed flange located on the opposite surface of said carton wall; and (e) simultaneously applying sufficient heat and pressure to the coinciding portions of said opposing flanges and only the carton surfaces they contact to continuously fuse said coinciding portions of said flanges to the innermost and outermost layers of said carton wall about the periphery of said cut hole, whereby the exposed paperboard layer at the edges of said cut hole is completely isolated from the liquid contained in or dispensed from said carbon through said one-piece pouring spout as well as any liquid to which said carton is exposed from the environment through which it passes prior to emptying of its contents and disposal thereof.