Variable thickness sheet extrusion apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20040065978A1
SERIAL NO

10266215

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A sheet extrusion apparatus for producing an extruded sheet with varying thickness including one or more sheet rollers and a strip material affixed to one or more of the rollers. The strip material rotates coextensively with the cylinder it is attached to, such that it engages the plastic passing between the rollers and forms a notch in the plastic sheet at that location. In a preferred embodiment, the strip material is a length of conventional tape, such as Teflon tape, that is capable of adhering to both the cylinder and itself, having sufficient durability to last a required amount of cycles. The present invention is easily retrofitted to an existing sheet extrusion apparatus, as the tape can simply be taken off of a shelf and added to the rollers. The present invention is preferably installed after an analysis to determine which sections of the plastic sheet may structurally withstand a reduced thickness.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
Corvac Composites, LLCGRANDVILLE, MI0

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fitzell, James Richard JR Flint, MI 6 3

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Clopay Plastic Products Company, Inc. (1)
* 6818083 Laminated sheet and method of making same 48 2002
 
MONSANTO COMPANY (1)
* 4323533 Rotary forming of articles 30 1980
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
OCTAL SAOC FZC (1)
* 2013/0126,543 SHEET WITH MULTIPLE THICKNESS AND METHODS FOR FORMING SAME 0 2012
* Cited By Examiner