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AssigneeAmerican Can Company
InventorsEdward F. Kubacki, Bengt S. Backe, Vance B. Gold, Harold J. Jessogne, Frederick G. Kudert, Harold C. Lemke, William D. Timmins
Estimating the term…
Elongated closed bottom shells (cans) are produced in the preferred manner by a double-acting punch body arranged on a horizontal axis and reciprocated between opposed die stations at a substantially constant velocity by a hydraulic force alternately applied to opposite sides of a ram on the punch body; blanks (of cup form) are fed to the die stations at times when the punch body dwells at the end of a stroke. Preferably the applied force is such that punch body attains peak (maximum) velocity before the punch encounters a cup centered at the die station; cup feed, cup positioning, punch body travel and formation of a shell of correct length are monitored (sensed) and in the event a programmed condition of machine function or production criterion is sensed as not satisfied, the machine is stopped. During the return stroke of the punch body, after a shell is formed at one station, fluid under pressure is applied by a unique porting arrangement to a separable part of the punch, which thereby serves as a stripper to hold the completed shell stationary at the die station while the remainder of the punch body is retracted from the shell; concurrently, air under pressure is ported in a unique fashion to break any vacuum inside of the shell. After the shell is stripped, the stripper is retracted at an accelerated rate to re-couple with the punch body as it moves toward the other die station. The main cylinder is so supported that thermal effects will not disturb the alignment of the punch body relative to the dies.
In a machine of the kind described having punch and die means cooperating at a forming station to develop the shell of a can from a blank:
In a machine of the kind described having punch and die means cooperating at a forming station to develop a can shell from a blank:
A method of controlling a reciprocal punch body and stripper housed therein which cooperate with a die means to form a can shell of predetermined length from a blank, while moving the punch and stripper forward by fluid under pressure, comprising the steps of:
A method of controlling a reciprocal punch body and stripper housed therein which cooperate with a die means to form a can shell of predetermined length from a blank, while moving the punch and stripper forward by fluid under pressure, comprising the steps of:
A combined fluid operated, reciprocal punch and stripper apparatus for producing a shell from a blank in cooperation with die means, the punch and stripper being so coupled as to move in unison during a forward stroke to produce the shell while enabling the punch to be retracted independently of the stripper and comprising:
A combined fluid operated, reciprocal punch and stripper apparatus for producing a shell from a blank in cooperation with die means during a forward stroke of the punch and comprising:
A horizontal double-acting fluid operated punch and stripper apparatus having a forward and reverse stroke for producing a can shell from a blank during each stroke, respectively by forcing each blank through die means at a pair of opposed shell forming stations, said apparatus including a centrally positioned cylinder block encompassing a reciprocal punch ram, a control valve for delivering operating fluid under pressure sequentially to opposed sides of the ram incidental to imparting said forward and reverse strokes, the construction of said apparatus being substantially identical outward from opposite sides of the ram, and comprising in respect of identity:
A machine for producing elongated shells of can dimension from blanks fed alternately to two spaced shell forming stations, and comprising:
A method of producing elongated shells of can dimensions from shorter blanks fed alternately to spaced die stacks arranged on a common horizontal axis at two shell forming stations and comprising:
In a machine which forms shells of can dimension from a blank by moving the blank through a deforming means including a die and in which the blank is of a material having given electromagnetic properties,
A machine for producing elongated shells of can dimension from blanks fed alternately to two spaced shell forming stations, and comprising:
A method of producing elongated shells of can dimension from blanks fed alternately to spaced die stacks arranged on a common horizontal axis at two shell forming stations and comprising:
A machine for producing elongated shells from shorter blanks fed alternately to two spaced shell forming stations, and comprising:
A method of producing elongated shells from blanks fed alternately to spaced die stacks arranged on a common horizontal axis at two shell forming stations and comprising:
In a machine of the kind described having punch and die means for forming the shell of a can from a blank:
In a machine of the kind described having a punch for producing elongated shells from cup-shaped blanks fed alternately to die means located at two forming stations, said stations being aligned on a horizontal axis at opposite ends of a hydraulically operated double-acting punch-supporting body, and said punch-supporting body being centered on said axis for forward and reverse strokes to produce a shell from a blank during each such stroke;
In a machine of the kind described having punch and die means cooperating at a forming station to produce an elongated shell from a cup of shorter length:
Dependencies are inferred from the claim text.