Walter E. Lewis
Real Estate Commission in Newark, DE
License number
Delaware RS-0020452
Issued Date
Sep 22, 2009
Expiration Date
Apr 30, 2018
Category
Real Estate
Type
Salesperson
Address
Address
2
Newark, DE 19711
Professional information
Heat-Sealing Wheels For Forming A Longitudinal Weld Or Seal In Seams Of Plastic Films
US Patent:
5935379, Aug 10, 1999
Filed:
Feb 27, 1998
Appl. No.:
9/032478
Inventors:
David Louis Frantz - Hockessin DE
Walter Ernest Lewis - Newark DE
Robert Vincent Jeral - Philadelphia PA
Frederick Henry Fiesser - Furlong PA
Walter Ernest Lewis - Newark DE
Robert Vincent Jeral - Philadelphia PA
Frederick Henry Fiesser - Furlong PA
Assignee:
E. I. du Pont de Nemours and Company - Wilmington DE
International Classification:
B30B 1500
US Classification:
156555
Abstract:
A heat seal wheel for use with a heat sealing apparatus associated with a continuous packaging machine, for forming a longitudinal seal in a flat sheet of flexible film. The heat seal wheel is characterized by a planar heater comprising a laminar resistive heating element sandwiched in between a top layer and a bottom layer of a thermally conductive and electrically insulative material. The top layer is bonded to the bottom surface a bearing disk, in contact with and supporting a rotating heat seal wheel for conductively heating the seal wheel and producing a heat seal in the seams of a moving web of plastic film.