Apparatus for trimming the neck of blow molded plastic bottles and method
AssigneeGraham Engineering Corporation
InventorEugene L. Moore
Life of this patent
Estimating the term…
Abstract
An apparatus for trimming a ring from the neck of a blow molded plastic bottle includes a reverse punch for cutting a ring from the neck and positioning the ring on the punch shaft and a ring stripper for cutting one side of the ring on the punch shaft and stripping the ring from the shaft. The ring stripper travels transversely of the punch shaft. As the reverse punch is retracted with the cut ring on the punch shaft, the ring stripper is moved transversely across the path of the punch shaft. The ring stripper engages an edge of the cut ring and subsequently moves the cut ring away and severs one side to strip the ring from the shaft.
Claims29
An apparatus for trimming a ring from a neck of a blow molded plastic bottle, the apparatus comprising:
- a body;
- a shaft bore in the body;
- an anvil bore at an end of the shaft bore;
- a punch shaft in the shaft bore, said punch shaft having an end adjacent the anvil bore, and a slot extending across said end of the punch shaft;
- a reverse punch on said end of the punch shaft, said reverse punch having a close fit in the anvil bore;
- a ring stripper member mounted in the slot, the ring stripper member including a blade and a ring hook;
- a stripper drive joined to the ring stripper member, the stripper drive moving the ring stripper member between a retracted position where the blade is located outwardly of the slot and the ring hook is located in the slot, and an extended position where the blade is located in the slot and the ring hook is located outwardly of the slot.
An apparatus for trimming a ring from a neck of a blow molded plastic bottle, the apparatus comprising:
- a body, a shaft bore in the body, an anvil bore at an end of the shaft bore, a punch shaft in the shaft bore, the punch shaft having an end adjacent the anvil bore, an opening in the end of the punch shaft, a reverse punch on the end of the punch shaft, said reverse punch having a close fit in the anvil bore, a cutter blade;
- a cutter blade drive joined to the cutter blade, in which the cutter blade drive moves the cutter blade between a retracted position away from the opening and an extended position in the opening.
A method of trimming a neck of a plastic blow molded bottle having V-recesses using a reverse punch mounted on a punch shaft, the method including the steps of:
- a) extending the reverse punch into the neck of a blow molded plastic bottle;
- b) retracting the reverse punch from out of the neck of the bottle to cut a ring of plastic including the V-recesses from the neck of the bottle in a single piece and position the trimmed ring on the punch shaft free from the bottle;
- c) moving a cutter blade toward the punch shaft to engage and cut a first portion of the ring while retaining the ring in a single piece;
- and
- d) engaging a second portion of the ring away from the first portion and moving such second portion away from the punch shaft to strip the ring from the punch shaft in a single piece.
Dependencies are inferred from the claim text.