Stock material or miscellaneous articles – Sheet – web – or layer weakened to permit separation through...
Patent
1994-10-06
1999-11-09
Thomas, Alexander
Stock material or miscellaneous articles
Sheet, web, or layer weakened to permit separation through...
428136, B32B 310
Patent
active
059810130
ABSTRACT:
A web of labels, particularly linerless labels, is produced which has specially formed perforation lines that are neither too strong or too weak. Each perforation line comprises alternating cuts and ties, including a cut to tie ratio of 0.18.times.0.008 to 0.012.times.0.008, and between 30-58 cuts per inch. Where permanent adhesive is used for the linerless labels, each perforation line comprises 45-58 cuts per inch, and has a percent of hold of 45-58%, with each cut having a thickness of about 0.028 inches. When repositional adhesive is used each perforation line comprises 30-45 cuts per inch, with a percent of hold of 25-35%. At least one, and typically substantially all, of the perforation lines have substantially V or U-shaped enlarged end terminations to facilitate dispensing of the labels. The perforations are formed by applying a perforation pressure of about 500-600 lbs. per inch to a perforating blade having a number of linearly spaced carbon steel (Rockwell hardness of C-32 to C-48) teeth, with 30-58 teeth per inch and each tooth having a thickness of about 0.025-0.030 inches and a height of about 0.930-0.946 inches.
REFERENCES:
patent: 2049030 (1936-07-01), Strauss
patent: 4745835 (1988-05-01), Schnitzer
patent: 5114771 (1992-05-01), Ogg et al.
patent: 5240755 (1993-08-01), Zimmer
patent: 5354588 (1994-10-01), Mitchell et al.
patent: 5537905 (1996-07-01), Zimmer
Baker Jay O.
Khatib Khal M.
Russ Timothy J.
Moore Business Forms Inc.
Thomas Alexander
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