Abstract: Copolymers of glycidyl methacrylate and allyl glycidyl ether having pendant epoxy groups, having an inherent viscosity of at least about 0.25, preferably within the range of about 0.25 to about 0.38, and an epoxy equivalent of at least about 0.65 epoxide equivalent per 100g. of polymer are provided which upon admixture with a radiation-sensitive aryldiazonium salt provide compositions which exhibit improved sensitivity, curing rates and other properties. Articles for recording and storing information from a laser source and other articles such as microfilm are derived from such compositions by subjecting a coated substrate to an energy source of sufficient intensity to decompose the radiation-sensitive catalyst and thus effect polymerization via the epoxy groups of the copolymer.

Abstract: A seamless, closed bottom steel container (shell) principally for food products, is drawn and lengthened from a starting blank of steel having a layer of tin; afterwards, the shell is baked to develop a corrosion resistant tin-iron alloy between the steel substrate and a reserve layer of unalloyed tin.

Abstract: Copolymers of glycidyl methacrylate and allyl glycidyl ether having pendant epoxy groups, having an inherent viscosity of at least about 0.25, preferably within the range of about 0.25 to about 0.38, and an epoxy equivalent of at least about 0.65 epoxide equivalent per 100g. of polymer are provided which upon admixture with a radiation-sensitive aryldiazonium salt provide compositions which exhibit improved sensitivity, curing rates and other properties. Articles for recording and storing information from a laser source and other articles such as microfilm are derived from such compositions by subjecting a coated substrate to an energy source of sufficient intensity to decompose the radiation-sensitive catalyst and thus effect polymerization via the epoxy groups of the copolymer.

Abstract: Parisons for use in making blow molded highly molecularly oriented plastic bottles are injection molded using a cooled cavity and a relatively hot core pin to prevent the formation of residual internal stress in or near the surface of the parison. The pin is maintained at a temperature above the glass transition temperature of the resin to reduce the formation of cracks when the parison is subsequently blow molded in the orientation temperature range.

Abstract: The instant invention relates to an end closure or cover for a metal container comprising a substantially flat sheet metal lid seamed about its extremity to the container body closing the end thereof. The lid has a pour opening having a closure hingedly connected to the lid and closing the pour opening, and wherein first and second sealing means are provided to seal the closure and to provide resistance of the closure to atmospheric pressure and premature opening of the container.

Abstract: Copolymers of glycidyl methacrylate and allyl glycidyl ether having pendant epoxy groups, having an inherent viscosity of at least about 0.25, preferably within the range of about 0.25 to about 0.38, and an epoxy equivalent of at least about 0.65 epoxide equivalent per 100g. of polymer are provided which upon admixture with a radiation-sensitive aryldiazonium salt provide compositions which exhibit improved sensitivity, curing rates and other properties. Articles for recording and storing information from a laser source and other articles such as microfilm are derived from such compositions by subjecting a coated substrate to an energy source of sufficient intensity to decompose the radiation-sensitive catalyst and thus effect polymerization via the epoxy groups of the copolymer.

Abstract: A nestable octagonal tray having tapered, glued side walls of low height. The tray has an octagonal bottom panel, four trapezoidal side walls each attached at its shorter parallel edge to the bottom panel, four trapezoidal side flaps each attached at its longer parallel edge to the bottom panel, and eight substantially rectangular glue flaps each attached along its base to one of the non-parallel sides of the trapezoidal side walls. The side flaps and glue flaps are adhered in overlapping relation.

Abstract: White pigmented, liquid, substantially solvent-free coating compositions are provided which may be rapidly cured to a solid, tightly adherent, opaque white coating upon exposure to radiation and particularly to electromagnetic radiation. More specifically, the compositions comprise epoxy monomers or prepolymers blended with a bis (epoxycycloalkyl)ester, a radiation-sensitive catalyst precursor effective to initiate polymerization of the epoxides upon exposure to radiation and certain alumina treated titanium dioxides, preferably of the rutile type.

Abstract: Copolymers of glycidyl methacrylate and allyl glycidyl ether having pendant epoxy groups, having an inherent viscosity of at least about 0.25, preferably within the range of about 0.25 to about 0.38, and an epoxy equivalent of at least about 0.65 epoxide equivalent per 100g. of polymer are provided which upon admixture with a radiation-sensitive aryldiazonium salt provide compositions which exhibit improved sensitivity, curing rates and other properties. Articles for recording and storing information from a laser source and other articles such as microfilm are derived from such compositions by subjecting a coated substrate to an energy source of sufficient intensity to decompose the radiation-sensitive catalyst and thus effect polymerization via the epoxy groups of the copolymer.

Abstract: Parisons are injection molded using a cooled cavity and a relatively hot core pin to prevent the formation of residual internal stress in or near the inner surface of the parison. The parison is promptly transferred while still hot from the injection mold to a temperature conditioning station to provide a desired temperature distribution and the temperature conditioned parison is highly molecularly biaxially oriented as it is blow molded.

Abstract: Copolymers of glycidyl methacrylate and allyl glycidyl ether having pendant epoxy groups, having an inherent viscosity of at least about 0.25, preferably within the range of about 0.25 to about 0.38, and an epoxy equivalent of at least about 0.65 epoxide equivalent per 100g. of polymer are provided which upon admixture with a radiation-sensitive aryldiazonium salt provide compositions which exhibit improved sensitivity, curing rates and other properties. Articles for recording and storing information from a laser source and other articles such as microfilm are derived from such compositions by subjecting a coated substrate to an energy source of sufficient intensity to decompose the radiation-sensitive catalyst and thus effect polymerization via the epoxy groups of the copolymer.

Abstract: Copolymers of glycidyl acrylate and allyl glycidyl ether and terpolymers derived from addition of glycidyl methacrylate to the polymerizable mixture, having an inherent viscosity within the range of about 0.09 to 0.28 and an epoxy equivalent of at least about 0.64 per 100 g. of polymer are provided which upon admixture with a catalyst which is a radiation-sensitive aryldiazonium salt of a complex halogenide, provides compositions suitable for use in a dry photopolymer positive imaging process. In the process, the polymer which is non-tacky at room temperature, together with the catalyst is applied to a substrate and exposed to an energy source for example, electromagnetic radiation through a transparency or mask. Following exposure, the coating is heated to the softening point of the unexposed portion of the coating and a powder or toner is applied thereto, the toner being adhered to only the tacky, non-exposed area of the coating, resulting in a pigmented image.

Abstract: A full panel, easy-open container end closure includes a double-folded band formed in the removable panel adjacent the peripheral score, and an opening tab having a nose portion disposed adjacent the peripheral score and band. The tab is secured to a hinge section defined in the removable panel by a rupturable, bowed, generally U-shaped ancillary score which is disposed with its two ends adjacent the band and tab nose portion. This construction effectively reduces the intial rearward force required to effect panel removal.

Abstract: A silencer device for an industrial burner is adapted to be positioned over the air intake orifice of the burner tube of the industrial burner and provides two separate air intake paths. One of the air paths is through a central outer port and then between a cylindrical noise suppressing core member, having a perforated conical face on one end backed by a noise absorbent material, and the inner perforated wall of a toroid-shaped member. The other air path is through circumferential openings at the rear end of the silencer device.

Abstract: A carton with a reclosable hinged cover formed by laterally spaced cut score lines in its top panel and front glue flap. The cut score lines in the glue flap flare upwardly to form arrow locking tabs which may be pushed through the cover opening so that the shoulders of the tabs lock under the front edge of the top panel. In the preferred form, the cut score lines forming the shoulders of the locking tabs extend only a portion of the way through the thickness of the paperboard and the cut score lines forming the cover portions in the top panel and glue flap are of the inside-outside double cut score type which provides partial thickness locking tabs and an overlapping cover.

Abstract: A molecularly oriented article having a tubular sidewall is blow-molded from a thermoplastic parison which is heat-treated prior to blowing to provide the parison sidewall with a temperature gradient wherein the temperature of the inside of the sidewall is greater than that of the outside, both of said temperatures being within the orientation temperature range of the thermoplastic. The temperature gradient results in the sidewall of the article having a different and more uniform circumferential orientation release stress distribution radially across the sidewall than would be obtained if the parison were blown isothermally.

Abstract: An inspection apparatus for inspecting and detecting flaws in serially fed substantially cylindrical objects. The inspection apparatus includes a notch-shaped inspection station formed by a pair of drive wheels mounted on a first shaft and a pair of discharge wheels fixedly mounted on a second shaft, parallel to the first shaft. A hook having a convex back surface is connected to and protrudes beyond the circumference of each discharge wheel. An L-shaped bracket whose body includes a sending surface and whose leg includes an infeed cradle, is mounted above the drive wheels and pivots in synchronism with the rotation of the discharge wheels. A first object in the infeed cradle is positively sent by the bracket sending surface toward the inspection station as the hook convex back surfaces are rotating up through the inspection station.

Abstract: A metal forming die having a unique profile is provided for use in producing cylindrical articles of elongated sidewall configuration. Most notably, the die is applicable to the production of drawn and ironed can shells.

Abstract: A method of hermetically pressure-resistantly double seaming a metal end closure to a metallic container body whose wall is highly-worked, has a substantially axial grain direction and is less than about 0.057 inch thick at its marginal end portion, which includes forming a body curl of the marginal end portion and double seaming the end closure thereto, and, the resulting double seamed metallic container whose double seam includes six substantially axial metallic layers, two of which are a radially compressed body curl.