Method of laminating transparent assemblies

• US 3,311,517 A
• Filed: 06/13/1963
• Issued: 03/28/1967
• Est. Priority Date: 08/02/1962
• Status: Expired due to Term

• Current Assignee: John S. Rankin, Leroy D. Keslar
• Original Assignee: John S. Rankin, Leroy D. Keslar
• Inventors: Keslar, Leroy D., Rankin, John S.
• Application Number:
  US04/287,632
• Time in Patent Office: 1,384 Days
• US Class Current: 156/104
• CPC Class Codes: B29C 43/3642 Bags, bleeder sheets or cauls for isostatic pressing
• CPC Class Codes: B29C 65/18 using heated tools
• CPC Class Codes: B29C 65/224 being a resistive ribbon, a resistive band or a resistive strip
• CPC Class Codes: B29C 65/229 characterised by the means for tensioning said heated wire, resistive ribbon, resistive band or resistive strip means for compensating for the thermal expansion of welding jaws in general B29C66/8185
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/43121 Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags closing tube ends B29C57/10
• CPC Class Codes: B29C 66/433 Casing-in, i.e. enclosing an element between two sheets by an outlined seam for bookbinding B42C11/06; for packaging B65B; by laminating B32B37/00; enclosing tubular articles between substantially flat elements B29C66/53261
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/723 being multi-layered B29C66/7292, B29C66/72941 take precedence
• CPC Class Codes: B29C 66/72326 Glass
• CPC Class Codes: B29C 66/73 characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
• CPC Class Codes: B29C 66/73366 both parts to be joined being transparent or translucent to visible light
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/80 General aspects of machine operations or constructions and parts thereof
• CPC Class Codes: B29C 66/8122 characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
• CPC Class Codes: B29C 66/81264 Mechanical properties, e.g. hardness
• CPC Class Codes: B29C 66/81431 comprising a single cavity, e.g. a groove
• CPC Class Codes: B29C 66/81433 being toothed, i.e. comprising several teeth or pins comprising a single tooth B29C66/81429, or being patterned
• CPC Class Codes: B29C 66/818 characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps characterised by the heating means B29C65/24; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
• CPC Class Codes: B29C 66/8242 Pneumatic or hydraulic drives using fluid pressure directly acting on the parts to be joined B29C66/8266
• CPC Class Codes: B29C 66/8322 : Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29C 66/8324 : Joining or pressing tools pivoting around one axis scissor or lever transmission mechanisms B29C66/8221; tools self-aligning to the joining plane B29C66/8163
• CPC Class Codes: B29K 2023/06 : PE, i.e. polyethylene
• CPC Class Codes: B29K 2067/003 : PET, i.e. poylethylene terephthalate
• CPC Class Codes: B29K 2067/043 : PGA, i.e. polyglycolic acid or polyglycolide
• CPC Class Codes: B29K 2077/00 : Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2823/06 : PE, i.e. polyethylene
• CPC Class Codes: B29K 2867/00 : Use of polyesters or derivatives thereof as mould material
• CPC Class Codes: B29K 2877/00 : Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as mould material
• CPC Class Codes: B29K 2995/0026 : Transparent
• CPC Class Codes: B29L 2031/7126 : large, e.g. for bulk storage
• CPC Class Codes: B29L 2031/7128 : Bags, sacks, sachets tea bags B29L2031/7122; medical bags B29L2031/7148
• CPC Class Codes: B32B 17/10036 : comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 : Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10366 : Reinforcements of the laminated safety glass or glazing against impact or intrusion containing metal wires for reinforcement B32B17/10412
• CPC Class Codes: B32B 17/10577 : Surface roughness
• CPC Class Codes: B32B 17/10761 : containing vinyl acetal
• CPC Class Codes: B32B 17/10816 : by pressing
• CPC Class Codes: B32B 17/10853 : the membrane being bag-shaped
• CPC Class Codes: B32B 17/10972 : Degassing during the lamination B32B17/10816 takes precedence
• CPC Class Codes: B32B 27/00 : Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18

Claims

1. IN A METHOD OF PREPARING AND LAMINATING TRANSPARENT ASEMBLIES WHEREIN A FLEXIBLE PLASTIC SHEET OF INTERLAYER MATERIAL CAPABLE OF SUBSTANTIAL DISTORTION AT ELEVATED TEMPERATURES AND PRESSUE IS SANDWICHED BETWEEN RIGID LAYERS OF TRANSPARENT MATERIAL AND THEREAFTER THE ASSEMBLY IS LAMINATED TOGETHER IN AN OIL AUTOCLAVE AT ELEVATED TEMPERATURES AND PRESSURES, THE IMPROVEMENT COMPRISING MOUNTING AN ASSEMBLY BETWEEN UPPER AND OWER WALLS OF A HORIZONTALLY DISPOSED BAG CONSISTING ESSENTIALLY OF A LAMINATED LAYER OF OIL AND MOISTURE RESISTANT PLASTIC MATERIAL AND AN INNER LAYER OF A HEAT-SEALABLE PLASTIC MATERIAL HAVING INWARDLY DIRECTED PROTUBERANCES PROVIDING PASSAGES THEREBETWEEN, SAID WALLS HAVING A THICKNESS NOT EXCEEDING .005 INCH SO AS TO CONFORM INTIMATELY TO THE OUTLINE OF THE ASSEMBLY, SAID BAG PRODUCED BY SEALING SAID LAMINATED MATERIAL TOGETHER ALONG THREE SIDES OUTSIDE THE MARGIN OF SAID ASSEMBLY TO FORM WALLS OF A BAG WITH AN ACCESS OPENING ENCLOSING SAID ASSEMBLY, EVACUATING THE INTERIOR OF SAID BAG THROUGH SAID ACCESS OPENING WHILE THE OUTER WALLS OF THE BAG ARE EXPOSED TO SUBSTANTIALLY NORMAL TEMPERATURE AND PRESSURE CONDITIONS TO CONFORM SAID BAG TO ITS ENCLOSED ASSEMBLY WITHOUT SUBSTANTIALY DEFORMING THE INTERLAYER MATERIAL, SEALING SAID ACCES OPENING WHILE MAINTAINING SAID BAG EVACUATED, AND EXPOSING THE SEALED BAG AND ITS CONTENTS TO AN ELEVATED TEMPERATURE AND PRESSURE FOR A TIME SUFFICIENT TO LAMINATE SAID ASSEMBLY, WITH SAID BAG ENCAPSULATING SAID ASSEMBLY IN SUCH INTIMATE CONTACT THAT IT RESISTS SUBSTANTIAL DEFORMATION OF THE FLEXIBLE INTERLAYER MATERIAL FORMING PART OF SAID ASSEMBLY DURING SAID EXPOSURE TO ELEVATED TEMPERATURE AND PRESSURE.

5. THE METHOD ACCORDING TO CLAIM 1, WHEREIN SAID ASSEMBLY TO BE LAMINATED COMPRISES INTERLAYER MATERIAL OF POLYVINYL BUTYRAL AND RIGID SHEETS COMPOSED OF GLASS.