Provided is a fastener, which has advantages over the prior art in that a retaining force is not dependent upon the biasing force of a spring, the fastener hardly comes out, and is less restricted in size than the prior art. The fastener has another important advantage over the prior art in that it forms no hole in plain cloth. A fitting portion (2) and a base portion (3) are assembled to have a clamping unit (1) opened. A stopper (4) is pushed together with the plain cloth into the inside of the clamping unit (1). This clamping unit (1) is closed to hold the plain cloth between the outer circumference of the stopper (4) and the leading ends of holding means (26 and 36). With slide portions (22) being fully fitted in groove portions (32), retaining pawls (23) are fitted in pawl receivers (33b).

Various embodiments of the present disclosure provide a new method and apparatus for fixing the end of a roll of wrapping film web to and releasing the end of the roll of wrapping film end from a circular guide wrapping machine when a new roll of wrapping film web is installed or when the wrapping film web has torn apart.

A clamp connector includes a first clamping member configured to apply a clamping force to a material, the first clamping member having a first portion including a first and second cam surfaces, a first cammed body adjacent the first cam surface, and a second cammed body adjacent the second cam surface. A second clamping member is configured to apply a clamping force to the material. The second clamping member having a second portion including a third and fourth cam surfaces, a third cammed body adjacent the third cam surface, and a fourth cammed body adjacent the fourth cam surface. When each cam surface is forced against the adjacent cammed body a clamping force between the first clamping member and the second clamping member is increased.