Abstract: A perforating device for punching pores in shrink-wrap film as the film moves along a film path is described. A biasing apparatus is used to bias the film towards a tension-creating apparatus and a microperforator apparatus so that pores can be punched in the film. An embodiment of the invention uses microperforator pin wheels, having a plurality of conically-shaped pins, and gripper wheels connected to a microperforator shaft. A rotary brush is connected to a rotary brush shaft. Shrink-wrap film is threaded between the microperforator shaft and the rotary brush shaft, and then pulled by an operator to wrap a package. The rotary brush biases the film towards the microperforator pin wheels and the gripper wheels, so that the pins on the micoperforator pin wheels puncture the film as it is being pulled. The rotary brush shaft can be adjusted to permit film to be threaded, and to control the size of the pores to be punched into the film.

Abstract: A form fill packaging and sealing apparatus comprises a film dispenser and a film forming plow which, together with a roller guide, forms the film to be sealed into a tube with the free edges at the side. The object to be packaged is inserted into the film tube. The free edges of the film are longitudinally sealed together at the side of the package by a rotary heat sealer and immediately cooled to approximate impulse sealing. The quality and width of the longitudinal seal can be adjusted by changing the amount that the film is preheated before sealing. A cross seal is made at the front and back of the object to be packaged. The excess gas in the package is pressed out by a presser before the back cross seal is made.

Abstract: A horizontal form fill packaging and sealing apparatus comprises a film dispenser and a film forming plow which, together with a roller guide, forms the film to be sealed into a tube with the free edges at the side. The object to be packaged is inserted into the film tube. The free edges of the film are longitudinally sealed together at the side of the package by a rotary heat sealer and immediately cooled to approximate impulse sealing, and a cross seal is made at the front and back of the object to be packaged. The excess gas in the package is pressed out by a presser before the back cross seal is made.