ApplicationNo. 05/906187 filed on 05/15/1978
US Classes:156/224, To form dished or receptacle-like product156/221, Subsequent to assembly156/222, Of parallel stacked sheets only156/285, Direct application of vacuum or fluid pressure during bonding156/322, Heating lamina prior to assembly or adhesive applying264/257, One component is a fibrous or textile sheet, web, or batt264/265, Conditioning or treatment of preform264/266, Simultaneously shaping material and reshaping preform264/275, Positioning or maintaining position of preform relative to mold surface264/292, By drawing over a form428/174, Nonplanar uniform thickness material428/417, Next to glass or quartz428/500, Of addition polymer from unsaturated monomers428/521, Polyene monomer-containing428/522Ester, halide or nitrile of addition polymer
ExaminersPrimary: Powell, William A.
Assistant: Dawson, Robert A.
Attorney, Agent or Firm
International ClassB29C 51/14 (20060101)
AbstractThermoforming, utilized for making articles from sheets of thermoplastic ins, does not always yield articles having desired strength properties. It has been suggested that both thermoplastic and thermosetting layers be used to making the articles stronger. However it was virtually impossible to bond the layers together. A process is provided herein for obtaining that bond.