US Patent No: 5,362,436

Number of patents in Portfolio can not be more than 2000

Polystyrene foam sheet useful for forming deep drawn articles, a process to produce those articles, and the deep drawn articles

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Importance

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Abstract

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A polystyrene foam sheet comprising a polystyrene resin which contains 1 to 15 wt % of a rubber component having a majority of particle sizes less than about 0.45 microns has been found to be superior for forming deep drawn articles. Optionally one or two films may be extrusion coated or laminated to the foam sheet prior to thermoforming. Also disclosed is a method for thermoforming the foam sheet. Preheat the sheet, clamp the sheet between the matched male and female mold members, move the members into final position while applying a vacuum through both members to both sides of the foamed sheet and then chill formed foam to set a final shape.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SOLO CUP OPERATING CORPORATIONHIGHLAND PARK, IL138

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wagner, Phillip A Essexville, MI 5 80

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Sekisui Kaseihin Kogyo Kabushiki Kaisha (1)
* 4,528,221 Polystyrene foamed sheet suitable for forming 45 1983
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (1)
* 5,039,714 Rubber-modified polystyrene resin composition 18 1989
 
TENNECO PLASTICS COMPANY (1)
* 4,359,160 Nestable foam cup with improved heat retention and the process for its manufacture 40 1980
 
BASF AKTIENGESELLSCHAFT (1)
* 4,493,922 Impact-resistant thermoplastic molding material 32 1984
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
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FINA TECHNOLOGY, INC. (1)
* 2008/0057,295 Engravable board 1 2006
 
3M INNOVATIVE PROPERTIES COMPANY (1)
* 2014/0349,094 MONOLITHIC MULTILAYER ARTICLE 0 2012
 
A.R.C.I.L. (2)
* 8,714,962 Thermoforming mould with thermal insulation and associated method 0 2010
* 2010/0237,543 THERMOFORMING MOULD WITH THERMAL INSULATION AND ASSOCIATED METHOD 0 2010
 
SEALED AIR CORPORATION (US) (1)
* 6,245,266 Method for making oriented polyethylene foam and foam produced thereby 7 1999
 
Styro-Stop, Inc. (1)
* 5,516,552 Insulation barrier and a method of making and insulation barrier for a roof insulation system 7 1995
 
AIRDEX INTERNATIONAL, INC. (1)
8,224,719 Light weight, strong, fire retardant dunnage platform bag and system of loading, dispensing and using bag 0 2009
 
University of Washington (2)
8,377,548 Multi-layered foamed polymeric objects and related methods 0 2010
9,296,185 Method for joining thermoplastic polymer material 0 2011
 
AIRDEX CORPORATION (14)
7,927,677 Method of making a dunnage platform 2 2006
* 2006/0243,175 Method of making a dunnage platform 2 2006
7,611,596 Method of making a dunnage platform 3 2006
7,923,087 Dunnage Platform 2 2006
7,544,262 Method of making a dunnage platform 3 2006
7,963,397 Modular, knock-down, light weight, thermally insulating, tamper proof shipping container and fire retardant shipping container bag 3 2007
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8,142,589 Method of making a dunnage platform 0 2009
8,244,602 Method for making a dunnage platform 0 2009
8,163,363 Dunnage platform 0 2011
8,224,721 Lightweight dunnage platform 0 2011
8,672,137 Modular, knock down, light weight, thermally insulating, tamper proof cargo container 1 2011
 
MicroGREEN Polymers (1)
8,877,331 Multi-layered foamed polymeric objects having segmented and varying physical properties and related methods 0 2009
 
PAVILION SERVICES LLC (1)
* 5,958,470 Vacuum forming apparatus for forming a three-dimensional surface article 6 1997
 
PACTIV LLC (11)
7,814,647 Reinforced plastic foam cup, method of and apparatus for manufacturing same 3 2005
7,704,347 Reinforced plastic foam cup, method of and apparatus for manufacturing same 8 2005
7,694,843 Reinforced plastic foam cup, method of and apparatus for manufacturing same 15 2005
7,552,841 Reinforced plastic foam cup, method of and apparatus for manufacturing same 34 2005
7,536,767 Method of manufacturing a reinforced plastic foam cup 18 2005
7,818,866 Method of reinforcing a plastic foam cup 12 2006
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8,828,170 Apparatus and method for manufacturing reinforced containers 2 2010
8,087,147 Method of reinforcing a plastic foam cup 14 2010
7,918,016 Reinforced plastic foam cup, method of and apparatus for manufacturing same 15 2010
8,622,208 Reinforced cup 1 2011
 
PLASTIC TECHNOLOGIES, INC. (1)
* 2008/0251,487 OVERMOLDED CONTAINER HAVING A FOAM LAYER 3 2008
 
AIRDEX INTERNATIOPNAL, INC. (1)
* 2011/0226,655 MODULAR, KNOCK DOWN, LIGHT WEIGHT, THERMALLY INSULATING, TAMPER PROOF CARGO CONTAINER 0 2011
 
Insul-Stop, Inc. (1)
* 5,506,048 Insulation barrier and a method of making a fire-retardant insulation barrier 4 1995
 
MICROSOFT TECHNOLOGY LICENSING, LLC (1)
* 2007/0074,121 Interfaces for a productivity suite application and a hosted user interface 18 2006
 
Convenience Food Systems, B.V. (1)
6,203,751 Method and apparatus for producing open containers from foam sheeting 7 1998
 
DART CONTAINER CORPORATION (9)
* 2010/0052,201 FOAMED CELLULAR PANELS AND RELATED METHODS 0 2009
8,827,197 Apparatus and method for interleaving polymeric roll for gas impregnation and solid-state foam processing 0 2009
* 2010/0112,301 APPARATUS AND METHOD FOR INTERLEAVING POLYMERIC ROLL FOR GAS IMPREGNATION AND SOLID-STATE FOAM PROCESSING 5 2009
9,296,126 Deep drawn microcellularly foamed polymeric containers made via solid-state gas impregnation thermoforming 0 2010
* 2010/0163,450 DEEP DRAWN MICROCELLULARLY FOAMED POLYMERIC CONTAINERS MADE VIA SOLID-STATE GAS IMPREGNATION THERMOFORMING 2 2010
* 2011/0081,524 MULTI-LAYERED FOAMED POLYMERIC OBJECTS AND RELATED METHODS 8 2010
8,517,709 Methods and pressure vessels for solid-state microcellular processing of thermoplastic rolls or sheets 0 2011
9,427,903 Roll fed flotation/impingement air ovens and related thermoforming systems for corrugation-free heating and expanding of gas impregnated thermoplastic webs 0 2012
8,858,849 Methods and pressure vessels for solid-state microcellular processing of thermoplastic rolls or sheets 0 2013
* Cited By Examiner