초록 ▼

An apparatus, method, and pack of tabless, self-opening bags with flapless aperture cutouts pack. In the apparatus and method, cylindrical dies connected to a vacuum source are used to cut out plugs of holes, and the plugs are evacuated to a receptacle. Compression bars, or a relatively shallow beve

An apparatus, method, and pack of tabless, self-opening bags with flapless aperture cutouts pack. In the apparatus and method, cylindrical dies connected to a vacuum source are used to cut out plugs of holes, and the plugs are evacuated to a receptacle. Compression bars, or a relatively shallow bevel cut on the cylindrical die, are used to form area of frangible bonding in the central tab portion of the bag pack. The pack of tabless, self-opening bags with flapless aperture cutouts has no flap portions which might inadvertently detach from bag pack.

대표청구항 ▼

[ We claim:] [1.] An apparatus for forming a pack of self-opening plastic bags from a stack of presealed bag pillowcases, the pack of self-opening plastic bags having a central tab portion extending from a mouth region, a pair of handles, and an aperture cutout formed in at least the central tab por

[ We claim:] [1.] An apparatus for forming a pack of self-opening plastic bags from a stack of presealed bag pillowcases, the pack of self-opening plastic bags having a central tab portion extending from a mouth region, a pair of handles, and an aperture cutout formed in at least the central tab portion, the apparatus comprising:a die unit, comprising at least one central mouth tab aperture die portion for forming an aperture cutout in the central tab portion, the at least one central mouth tab aperture die portion having a continuous perimeter blade wall which defines an interior passageway therein, the continuous perimeter blade wall having a forwardly lying sharpened cutting edge for use in forming the aperture cutout in the central tab portion, having a sharp bag outline cuitting blade bent to define a shape to form the mouth region, handles, and central mouth tab in the pack of bags, and a compression means for forming frangibly bonded areas in the central tab portion of the pack of self-opening plastic bags;means for moving the die unit;a vacuum generating source;a receptacle connected to the vacuum generating source;vacuum lines connecting the interior passageways of the at least one die with the receptacle;wherein application of the die unit by the means for moving the die unit to a stack of presealed bag pillowcases will cause plugs corresponding to material removed from the bag pack by the continuous perimeter blade wall to define the aperture cutouts to be cut from the bag pack, and will cause localized areas of frangible bonding to be formed through the stack of presealed bag pillowcases, wherein the plugs will be evacuated through the vacuum lines to the receptacle.