Abstract: This disclosure relates to a sheeting-plate formed of two cover plates joined by transversely extending webs wherein the webs are formed integral with at least one of the cover plates by being folded out of the plane thereof and are secured to the other cover plate by welding. The webs are notched to receive upstanding reinforcing members, and the cavities defined by the webs may be filled with a reinforcing plastics material.

Abstract: A honeycomb type core configuration for composite structural panels generated by folding sheet material. The box shaped core, when attached to a surface sheet imparts rigidity to the sheet for use as a high strength to weight ratio structural sheet panel. The cell walls of the folded core are integral with the cell bottom which provides a large surface area for ease of attachment to the surface sheet.

Abstract: A thin wood sheet is folded in a zig-zag manner to have substantially the same height and provided with cuts partially extending in the wood sheet at the folded outer end portions along the grain direction thereof.Before the wood sheet is folded in a zig-zag manner, the thin wood sheet is shaped in a wave form and partially cut at the top and bottom of the wave form along the grain direction.

Abstract: Metal, fiber or plastic panels are fabricated by the attachment of planar imperforate and/or partially perforated outer sheets to a specially formed center member comprising a web or sheet having a deformed surface defining an array of adjacent triangular projections and depressions. The center member is produced by the longitudinal cutting and folding of the web as it passes between two forming cylinders which mesh with one another, the cylinder peripheries carrying complementary arrays of spaced triangular-shaped tooth elements having their base lines aligned in the opposing cylinders, to shear and thereby relieve the passing web laterally so as to produce intermittent parallel cuts and angular folds in the web while gathering the web longitudinally thereby to form triangular, flat-topped cells in the center member. Instead of using two outer sheets, the formed center member can be used per se, e.g., as a packing medium, or it can be combined with only one outer sheet to form a single-face product.

Abstract: A self-tracking recording tape is disclosed. The invention is primarily directed to thin base magnetic recording tape. However, the concepts of this invention are equally applicable to other recording tapes or film. Instead of a flat base tape, the tape of this invention is corrugated to form a plurality of V-shaped tracks across the width of the tape. The tape reels, the transport mechanisms, and the playback-reproduce heads utilized with the tape of this invention are all designed to accommodate the V-shaped grooves in the tape. In this manner, the tape becomes essentially self-tracking. That is, no auxiliary or additional guide means such as the edge guides normally used with magnetic tape recorders, are required to properly guide the tape across the head. In addition to the self-tracking feature, tapes designed in accordance with this invention can accommodate a large number of tracks across a given width of tape.

Abstract: The single-stage building of 0.degree. belted pneumatic tires completely in flat band form on standard building drums, is disclosed. The feasibility of the process rests on the provision of the substantially inextensible metallic or non-metallic belt cords in the form of longitudinally extensible high "soft stretch" tapes. In a preferred version of the invention, the tape is composed of a plurality of cords each having formed therein a multiplicity of undulations which in any given straight length of the tape are substantially planar, the cords being disposed in side by side relation so that the planes of the undulations of each cord are generally parallel to the planes of the undulations of each adjacent cord, and the cords together with a relatively weak and frangible but only minimally undulated stabilizing yarn for the tape being secured to each other and held in their undulating state by a relative weak, chain stitch knitted, frangible stitching yarn or thread.

Abstract: The single-stage building of 0.degree. belted pneumatic tires completely in flat band form on standard building drums, is disclosed. The feasibility of the process rests on the provision of the substantially inextensible metallic or non-metallic belt cords in the form of longitudinally extensible high "soft stretch" tapes. In a preferred version of the invention, the tape is composed of a plurality of cords each having formed therein a multiplicity of undulations which in any given straight length of the tape are substantially planar, the cords being disposed in side by side relation so that the planes of the undulations of each cord are generally parallel to the planes of the undulations of each adjacent cord, and the cords together with a relatively weak and frangible but only minimally undulated stabilizing yarn for the tape being secured to each other and held in their undulating state by a relative weak, chain stitch knitted, frangible stitching yarn or thread.

Abstract: Sections of sandwich panel structure have corrugated cores which may be formed from folded sheets or plates, the fold lines of each such section forming an oblique angle with the edges of the panel section. A composite panel may be formed from a plurality of such panel sections which join together along pairs of edges thereof, a shear plate being placed along such edges to extend between the panel surfaces to provide structural continuity between the panel sections.