Method of making plastic impregnated paper tubes and resulting product
United States Patent 3170489
US Patent References:
/0374133.html
- - 0374133

/0444233.html
- - 0444233

/1271211.html
- - 1271211

Manufacture of paper tubes
- - 2075325

Pipe wrapping material
- - 2360109


Inventors:
Cunningham, Mccleery B.
Publication Date:
02/23/1965
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Assignee:
SONOCO PRODUCTS CO
Primary Class:
138/145
International Classes:
B31C3/00
US Patent References:
2552599Conduit pipe
2828798Method of applying a protective wrapping to a pipe
2895511Ground surfaced laminated paper tubes
2937665Pipe covering
3005742Method of forming a pipe covering