Convolute cardboard tube, apparatus and method for manufacturing the same
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
-
Jun 28, 2022
Grant Date -
N/A
app pub date -
Oct 15, 2021
filing date -
Oct 15, 2021
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2021 Application Filing Year
- B65H Class
- 1131 Applications Filed
- 653 Patents Issued To-Date
- 57.74 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B65H Class
- 72.78 % this patent is cited more than
- 3 Age
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