A combination of a dispenser for dispensing portions of sealing material and a sealing material in the form of a flexible film, wherein the sealing material comprises polytetrafluoroethylene film having the following parameters: a film thickness of 50 to 500 μm; a density between 1.20 and 1.80 g/cm3; a longitudinal strength of more than 11 N/mm2; a transversal strength of more than 2 N/mm2; a longitudinal elongation of more than 200%; and a transversal elongation of more than 1000%.

An apparatus for sealing an object, such as a bag, with a one-sided adhesive tape includes a rigid base fixed with a rear plate that has a tape roll spindle rotationally attached thereto. A front plate is fixed with the rear plate with at least one standoff, defining a gap therebetween for holding a sealing mechanism. The front and rear plates each include a sealing pathway traversing a top side of each plate and terminating at an orthogonally-oriented cutting pathway. The sealing mechanism comprises an indexing wheel, a tape brake having a tape engaging surface urged against the indexing wheel, and a tape cutter having a cutting blade fixed with an upper end thereof. An object cutter includes a blade for cutting the object when the object is moved through the cutting pathway.

A tape wrapping and dispensing device for wrapping stretchable tape around a pipe. The device has at least three tension rollers that are mounted at the dispensing end of a support plate, the tension rollers defining a first nip between an upper and intermediate roller and a second nip between the intermediate roller and a lower dispensing roller. In use, a free end of the stretchable tape can be removed from the supply roll and passed, first, between the first nip and then between the second nip before being secured to a pipe or other elongate body, and then, with the lower dispensing roller in direct contact with the stretchable tape secured to the pipe or other elongate body, the device can be moved in a first circumferential direction around the pipe to cause rotation of the lower dispensing roller and simultaneously dispense and wind the tape therearound.

A combination of a dispenser for dispensing portions of sealing material and a sealing material in the form of a flexible film, wherein the sealing material comprises polytetrafluoroethylene film having the following parameters: a film thickness of 50 to 500 m; a density between 1.20 and 1.80 g/cm3; a longitudinal strength of more than 11 N/mm2; a transversal strength of more than 2 N/mm2; a longitudinal elongation of more than 200%; and a transversal elongation of more than 1000%.