A two-walled carton for packaging an article. The carton has a front wall and an opposed rear wall joined together along their side edges to form a hollow enclosure of substantially elliptical cross section for receiving the article. The front wall of the carton has an end flap recessed from each end thereof. The end flaps close off the open ends of the carton when the end flaps are folded in a lateral direction substantially at right angles to the front wall. The end flaps extend toward and int...

The method of drawing uniformly heavy walled parts in a multiple plunger machine without any intermediate anneals and a machine for carrying out the method. The method comprises a number of press operations which convert a flat blank to a final desired drawn configuration, the relatively uniform wall thickness being maintained throughout the operation by the mouth configuration of each die and by means of supplemental sleeves that assist the punches in extending the drawn shells into the dies wi...

A double-walled chimney comprising inner and outer concentric pipes providing an annular insulating space between them is made up of coaxial end-to-end inner pipes surrounded by concentric, coaxial outer pipes. The inner pipes meet at a junction transverse or radial to the basic axis and are interconnected by an inner, annular ring. The outer pipes stop axially short of meeting so that an annular gap exists that exposes or opens to the junction of the inner pipes. Circumferentially spaced apart ...

A breakwater which has a rear wall and several front walls to break up the incident waves, the front walls having holes therein to pass the waves, which holes diminish in size from the front wall which takes the initial impact of the wave towards the back wall. In various embodiments the breakwater may have a sloping back wall, convex-concave indentations on the back wall, partitions dividing up into compartments the chambers in front of the back wall, and a sloping second wall.

A double walled fuel line for use with fuel injection engines including first and second, nominally concentric tubes having an annular space therebetween. both of the tubes are bendable on conventional tube bending equipment and the innermost tube mounts fittings for connection into a fuel injection system. An additional fitting associated with the outermost tube establishes fluid communication to the annular space between the tubes for venting leaking fuel.

A double walled panel (1) comprising on its small longitudinal sides (2a, 2b) a profiling formed in cross-section by a curved nose (7) which faces a wide side surface (10) the base of which is located at a distance from the same wide side surface (10). A free-standing thickened portion (6) is disposed at the other small side (2a) and supported near the same wide side surface (10) fitting into an adjacent panel recess (5) enclosed by its curved nose (7).

A fixing cover for a walled faucet, and more specifically, novel structure for fixture to reinforce the rear section of a faucet installed straight against a wall. It includes number of folded segments selectively distributed along the interior of a central section, to permit fitting of an annular pad by reverse setting. Thus the rebounding tension inherent inside compression members distributed along the inner diameter of the annular pad may bear against the rear portion of the faucet relative ...

There is disclosed a flexible-walled demountable greenhouse in which the support structure consists of a plurality of rods, for example 6, extending from the periphery of the base to a cap structure at the top central portion of the greenhouse; the rods are of fiberglass or other strong, light material and are keyed at one end to lock into the cap structure. The walls are preferably a double thickness of plastic such as polyvinyl chloride or polyethylene having vertically extending seams to form...

Double walled tubing, a method and apparatus for producing the same are disclosed. First and second metal tubes of substantially identical diameters are selected. One end of the second tube is expanded, and the first tube is pushed into the second tube. By mounting the first tube on a mandrel having a mandrel ball with an outer diameter which approximates the inner diameter of the first tube, any creases in the first tube caused by the insertion will be removed by the mandrel ball upon withdrawi...

A hollow walled tray is provided including a generally rectangular bottom panel, and wall structures hinged to the side and end edges thereof. Each wall structure includes an outer wall panel, a top wall panel, an inner wall panel, and a glue flap. The wall structures are all folded inwardly to overlie the bottom, with the ends of the top panels of one opposed pair of wall structures overlying the ends of the top panel of the other opposed pair of wall structures. When the wall structures are fo...