Abstract: A method of forming a rectangular laminated frame for an electro-magnetic device such as a solenoid includes forming a rectangular laminated frame. Formation of the frame includes winding a strip of material in spiral fashion to produce a generally annular blank and then subjecting the blank to a forming process. The forming process involves applying to the blank pressure in an outward direction at 4 spaced points on the inner peripheral surface of the blank. This applied to outward pressure deforms the blank to the required shape.

Abstract: Shaped insulation material is formed by passing a porous envelope containing insulation material such as that comprising silica aerogel and an opacifier through a series of rolls followed by making the shape so formed rigid.

Abstract: A sleeve forming method wherein a rectangular sheet of thermoplastic material is formed into a tubular shape having overlapped end portions that are sealed together by directing heated air between the end portions to soften their facing surface and pressing the end portions together to form a seam. The seam preferably is liquid-tight, so that the sleeve may be utilized to form the sidewall of a cup or nestable container wherein the sleeve is heat-shrunk about a generally frusto-conically shaped mandrel to give the container sidewall its desired shape. A two-piece container can be formed by sealing a bottom disc member to the end of the sidewall, and a one-piece container can be formed by collapsing and fusing the end of the sidewall sleeve to close the bottom of the container.

Abstract: A process for manufacturing tennis racket frames including lining the contoured mold cavities of a mold with layers of predetermined oriented plastic strip material, encompassing elastic inflatable tubes in said mold cavities with superimposed layers or applications of unidirectionally and diagonally oriented prepreg material, positioning the tubes in the mold halves, inserting a hard foam member in the mold cavities in space bounded by each of the tubes, folding the first layers of prepreg material over the hard foam member, closing the mold halves, and polymerizing the prepreg material layers under heat and pressure so as to form a molded tennis racket frame.