Strip of binding tape

DETAILED DESCRIPTION OF THE PRESENT INVENTION The present invention is directed to a pressure sensitive adhesive strip for use in binding sheets together.
The strips are adapted for use with a binding device which prepares a stack of sheets for binding by shingling or offsetting the edges of the sheets along the edge to be bound and positioning the edges on a platen.
The strip of tape of the present invention is then placed over the offset edges and placed in contact with the edges.
The tape strip is supple and will conform to the step like treads and risers of the sheets.
The package of the present invention comprises a plurality of strips of tape as illustrated in the drawing, each comprising a backing with a coating on one surface of a pressure sensitive adhesive.
The backing is preferably formed of a nonwoven fibrous material.
In the drawing, a stack or pad, generally designated 5, of tape strips 6 and removable tabs 7 is illustrated.
Each strip 6 has a backing generally designated 10, of preferably a unified nonwoven fibrous fabric carrying a continuous coating of pressure-sensitive adhesive 11.
The backing 10 is also coated with a barrier coating 12 on the surface opposite the adhesive coated surface to restrict migration or viscoelastic flow of the adhesive 11 to the opposite surface of the tape.
The barrier coating 12 is coated with a release coat or low-adhesion backsizing 14 to permit subsequent release and separation of one strip in the pad from the other when a tab 7 is lifted to peel the tape strips 6 apart.
An example of the backing 10 for the presently preferred embodiment of the adhesive tape and process of making is hereinafter described.
Staple viscose-rayon textile fibers having a length in the range of 1 to 2 inches (25.
4 to 50.
8 mm), are formed into a continuous fluffy web by a garnett machine or the like, or by a "Rando-Webber" machine (sold by Curlator Corp.
, Rochester, N.
Y.
).
A typical web is composed of 11/2 denier fibers of 11/4 inch length (31.
75 mm) adapted to provide a fiber weight in the finished fabric of about 75 to 100 pounds per thousand square yards (40