US3599470A - Control system for container manufacturing apparatus - Google Patents

Control system for container manufacturing apparatus Download PDF

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Publication number
US3599470A
US3599470A US859997A US3599470DA US3599470A US 3599470 A US3599470 A US 3599470A US 859997 A US859997 A US 859997A US 3599470D A US3599470D A US 3599470DA US 3599470 A US3599470 A US 3599470A
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Prior art keywords
fluid
piston
circuit
fluid circuit
punch
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Expired - Lifetime
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US859997A
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English (en)
Inventor
A Dean Smith
Fred R Waechter
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Kaiser Aluminum and Chemical Corp
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Kaiser Aluminum and Chemical Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/02—Systems with continuously-operating input and output apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/10—Compensation of the liquid content in a system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H43/00—Other fluid gearing, e.g. with oscillating input or output

Definitions

  • Unite a tee a emit n 1 ammo
  • A. Dean Smith also known as Arthur Dean Smith, San Lorenzo; Fred R. Waechter, Oakland both of, Calif.
  • Appl. No. 859,997 Filed Sept. 22, 1969 Patented Aug. 17, 1971 Assignee Kaiser Aluminum 8; Chemical Corporation Oakland, Calif.
  • ABSTRACT Improved device for sensing and replenishing fluid losses in selected portions of a closed fluid driving circuit within which a piston is mounted, said piston having at least one punch means attached to each side thereof so as to effectively regulate the amount of travel of the piston in either direction at all times as well as the punches attached thereto.
  • the instant fluid makeup system while employing the basic principles of the fluid makeup system of the aforementioned patent, constitutes an improvement thereover in that the instant system eliminates certain of the elements of the prior system and thus provides for a more simplified and more overall trouble-free control system in lieu thereof.
  • the drawing is a schematic view with parts removed of the fluid actuating and control system for a container forming apparatus as well as the container forming apparatus in which the improved makeup or drift control device of the instant in vention is incorporated.
  • the container forming apparatus embodying the improved control system of the instant invention generally comprises an overall housing 12 that includes, as in the case of the device of U.S. Pat. No. 3,457,766, a prime mover or power unit 14 comprised of a crank arm shaft 16 connected to a pair of crank arms 18, only one of which is shown in dotted lines.
  • Crank arms 18 are disposed on opposing stub journals, only one of which is shown at 20.
  • the journals are mounted in appropriate bearings and are adapted to be rotatably driven by a drive wheel 21 in a conventional fashion. As the drive wheel rotates, it causes movement of shaft 16 located in and connected to slide fitting 22.
  • slide fitting 22 moves up and down in the hollowed-out interior 24 of a double-acting yoke 26, it causes corresponding movement of drive yoke 26 to the left or to the right in cyclic fashion whereupon left and righthand pistons 28 and 30 connected to yoke 26 will also be correspondingly moved forward and backward.
  • pistons are forced forward and backward, they will act upon the fluid, such as hydraulic fluid, contained in the closed fluid circuit made up principally of the fluid in fluid-containing chambers 32 and 34 on opposing sides of a common actuating or slave piston 36, and the interior chamber 38 of elongated cylinder 40 for piston 36 located at the top of housing 12.
  • each of the opposing sides of actuating piston 36 is an elongated piston rod 42.
  • One or more forming rams or punches 44 are suitably connected, such as in a forklike manner, to the outer free end of each piston rod 42.
  • slave or driving piston 36 is thus disposed in one portion of the circuit and yoke 26 in another portion of the circuit.
  • Punches 44 are adapted to be passed along with cupshaped workpieces to be drawn and ironed through their associated tool packs schematically indicated at 45 and made up of various die elements of the type shown and described, for example, in U.S. Pat. No. 3,399,558 to Langewis et al. granted on Sept. 3, 1968.
  • Chambers 32 and 34 are further provided with an overload fluid-filled bypass 46, which includes poppet valve assemblies 48, for bringing the bypass into fluid intercommunication with chambers 32, 34 and 38 whenever one of the rams 44 encounters an obstruction, all as set forth in; detail in the aforementioned U.S. Pat. No. 3,457,766.
  • an overload fluid-filled bypass 46 which includes poppet valve assemblies 48, for bringing the bypass into fluid intercommunication with chambers 32, 34 and 38 whenever one of the rams 44 encounters an obstruction, all as set forth in; detail in the aforementioned U.S. Pat. No. 3,457,766.
  • This control system includes a makeup pump 50, driven by a motor 52.
  • Pump 50 forces hydraulic fluid, such as oil, at a pressure usually on the order of 4050 p.s.i., to pass from a tank or reservoir 54 through a main line 56 and branch conduits 58 and 53a and 60 and 60a to chambers 34 and 32 of housing 12 respectively and past one-way check valve 88 in line 58 and valve 90 in line 60.
  • a relief valve 62 is connected across main line 56 by way of conduit 64 and releases excess fluid from line 64 into exhaust line 66 and to the reservoir 54.
  • the main line of pump 50 can be connected to various bearings for the crank arms 18 and various bearings for the yoke element 26 so as to adequately lubricate all of these bearings during continuous operation of the apparatus.
  • an appropriate filter 68 can be incorporated in main line 56 on the inlet side of pump 50.
  • pump 50 in cooperation with check vallves 88 and 90 serves to maintain pressure fluid at the desired predetermined pressure level in chambers 32, 34 and 38 during operation of the container forming apparatus even though fluid under pressure tends to leak from chambers 32, 34 and 38 of housing 12, and past pistons 28 and 36 of yoke 26 and in between a piston rod 42 and the openings therefrom in portions of overall housing 12.
  • Continuous maintenance by makeup pump 50 of the fluid under pressure at a predetermined level in chambers 32, 34 and 38 advantageously assures proper performance of the control system of the instant invention as will be more fully discussed hereinafter.
  • each one of the pair of fluid replenishing circuits 70 for the main closed fluid circuit is not only interconnected to pump 50, but also to each other as well as being individually interconnected to a chamber 32 or 34, as the case may be, on opposite sides of double-acting actuating piston 36.
  • each fluid replenishment circuit 70 is made up of l ke parts, a description ofone such circuit will generally suffice for both.
  • a fluid replenishing circuit 70 is generally comprised of a fluid replenishing and displacement chambered device 74, four way two position valve 76, and a pair of solenoids 78 for selectively positioning the valve in one of its two positions.
  • a check valve 84 is disposed in branch conduit between valve 76 and branch conduit 58a for the left-hand fluid replenishing circuit 76, and a check valve 86 is disposed in branch conduit 82 between valve 76 and branch conduit 60a for the righthand fluid circuit 70, all as indicated in the drawing.
  • each fluid replenishing circuit 70 generally comprises a hollow cylinder 92 closed off at its opposite ends.
  • a piston element 94 is disposed within the cylinder and an apertured piston bearing element 96 is intermediately disposed between the ends of the cylinder for bearingly supporting piston element 94 during its reciprocation between the ends of cylinder 92.
  • fluid replenishing device 74 is illustrated as having a reciprocating piston 94, other types of fluid replenishing devices 74 could be used, such as a rotary fluid displacement device, the vanes of which could be movable in clockwise or counterclockwise directions.
  • sensor control circuit advantageously ties in the pair of solethe usual input'lines 102, the outer terminal ends of which are I usually connected to a 60-cycle AC source (not shown).
  • Sensor 103 of each circuit 70 is affixed to the framework (not shown) of the apparatus a predetermined distance back from the point identified by a dotted reference line 105 that would be the normally retracted position of the punch or punches 44 with which it is associated while being in radial alignment with a piston rod 42 to which the same ram or rams 44 are connected.
  • a dotted reference line 105 that would be the normally retracted position of the punch or punches 44 with which it is associated while being in radial alignment with a piston rod 42 to which the same ram or rams 44 are connected.
  • the punch or series of punches 44 associated therewith will be returned to a retracted or rearwardmost position as indicated by reference line 105 therefor in the drawing. 7
  • Sensor 103 connected to its associated amplifier 97 by a lead 104 can be of the type generally sold by Peco, Corp. of Mountain View, California, and commercially identified by Model No. A- 3 140 for generating an electromagnet field F in a general direction at right angles to the longitudinal axis of a piston rod 42.
  • a piston rod 42 and the rams 44 associated with a given sensor 103 are of an electrically conductive material, such as a suitable grade of steel, the sensor 103 can be minutely adjusted whereby piston rod 42 and rams 44 will induce a certain selected counterreactance in the sensor 103 during relatively small ou't-of-balance or drifting movements of piston rod 42 during the reciprocation thereof.
  • the doubleacting piston 36 is balanced relative, to reciprocal movements of yoke 26 and does not deleteriously drift to the right or left, the resultant reciprocal movements of a piston rod 42 and its associated monitoring sensor 103 will not operate to induce a counterreactance'signal in the sensor for transmission to amplifier 97 through lead 104.
  • each piston 28 or 30 of yoke element 26 is advantageously of a substantially larger diameter than pistonlike element 94 of each fluid displacement and replenishing chamber device 74 as well as being of larger diameter than piston 36.
  • the stroke multiplier concept involved herein advantageously contributes to the control system of the instant invention for uniquely transferring excess fluid from one side of piston 36 to the opposite and fluid defi- I cient side thereof whenever an unbalancing of piston 36 -oc-. curs as a result of the unequal amounts of fluid on the oppos- I ing sides of piston 36, during operation of the apparatus as will be described below.
  • sensor 103 generatingand transmitting a signal through its lead l04 to its amplifier 97 in the left-hand replenishing circuit 70.
  • the signal from sensor 103 will cause this left-hand amplifier'97 to generate and transmit a signal through one of its leads, such as lead 100, to energize the right-hand solenoid 78 for valve 76in the left-hand replenishing circuit 70, as viewed in the drawing.
  • Right-hand solenoid 78 will then operate the valve spool of valve 76, whereby valve ports Band C of valve 76 are interconnected at the same time ports A and D are interconnected.
  • left-hand valve 76 With left-hand valve 76 in this position, fluid from chamber 32 andactivated as a result of the leftward stroke movement of yoke 26 and piston 28 can be passed from chamber 32 through lines 60a and 82 into valve 76 through ports B and C and then through line 81 and against the left side of piston 94 and the left-hand winged elements 94 affixed to piston 94.
  • piston 28 being of a substantially larger diameter than piston winged elements 94', the activated fluid under pressure from chamber 32 causes movement of piston 94 in chamber 74 proportionately a greater distance to the right for I a small incremental leftward movementof piston 28 until the right end of piston 94 abuts the right end ofleft-hand cylinder 92.
  • Piston 94 upon its movement to the right effects passage of fluid out of cylinder 92, line 84 and left-hand valve 76 by way of ports A and D.
  • the fluid then passes check valve 84 which is ir ctive due to the leftward movement of piston 30 of yoke 26, and then moves through left-hand valve line 80 and line 58a into the fluid deficient chamber 34. This transfer of activated flu.
  • the replenishing fluid from the right end of left-hand cylinder 92 can enter and refill fluid deficient chamber 34 thereby resulting in an immediate rebalancing of an unbalanced stroke of piston 36 to the right.
  • the volume of the activated replenishing fluid from the right end of left-hand cylinder 92 is substantially less than the volume of fluid within fluid deficient chamber 34, the volume of activated replenishing fluid admitted to chamber 34 will be immediately absorbed by the larger volume of the fluid therein without adversely affecting the reciprocal stroking of yoke 26 and the rebalancing of an unbalanced stroke of piston 36.
  • left-hand piston 94 operates to replenish chamber 34, the right-hand replenishing circuit 70 is automatically disconnected from chamber 32 by virtue of the oneway check valve 86 therefor as well as check valves 88 and 90, thus forcing fluid from chamber 32 to operate the left-hand plunger 94 only.
  • each amplifier 97 is structured and electrically connected to the left and right-hand solenoids 78 for its associated valve 76 in a manner well known in the art whereby it functions to transmits a signal impulse and trigger alternately first one solenoid 78 and then the other solenoid, e.g., first the right solenoid and then the left, each time a separate or individual signal is generated by a sensor 103.
  • valve spool remains until on the next successive signal from the same sensor 103 on the left-hand side of the apparatus the left-hand solenoid for left-hand valve 76 is triggered and operates to move the valve spool to connect ports A and C and ports B and D.
  • sensor 103 and its associated amplifier 97 act as an overall, simple flip-flop-type switch.
  • right-hand replenishing circuit 70 is automatically disconnected or isolated from chamber 32 by check valve 86 in line 82 during the successive uctuations of lefthand valve 76.
  • the transmitted signal from right-hand sensor 103 causes right-hand amplifier 97 to transmit a signal through conductor 98 or depending on the specific signal generating condition of amplifier 97 in order to effect energization of right or left'hand solenoid 78 for right-hand valve 76.
  • Energization, for example, of the right-hand solenoid 78 causes the valve spool of valve 76 to place valve ports A and C in fluid interconnection at the same time ports B and D of the valve are connected.
  • valve port A connected to port C and port B to port D in the valve of right-hand circuit 70
  • activated fluid under pressure from chamber 34 is directed to the left-hand end of fluid pump device 74 through lines 58a, 80 and 81 to advance piston 94 in the right-hand pump device 74 to the right as indicated by dotted arrow lines in the drawing.
  • This rightward advancement of piston 94 causes displacement from pump chamber device 74 in the right-hand replenishing circuit 74 of a predetermined amount of replenishing fluid at an activated pressure level greater then the activated pressure of excess fluid from chamber 34.
  • This replenishing fluid is then admitted to fluid-deficient chamber 32 through check valve 86 and aligned ports B and D of valve 76 and lines 83, 82 and 60a.
  • Left-hand replenishing circuit 70 is at the same time automatically disconnected from chamber 34 by virtue of check valve 84 therein being subjected to fluid under pressure from chamber 34 through lines 58a and 80 during an overstroke of piston 36 to the left as viewed in the drawing.
  • Fluid in the right end of chamber 92 causes right-hand pump piston 94 to be displaced to the left as indicated by the solid arrow line in the drawing thereby displacing a predetermined amount of activated fluid from the left end of the pump device at a greater pressure level than the activated fluid from chamber 34.
  • This replenishing fluid is then admitted to fluid circuit chamber 32 through aligned ports B and C of valve 76 and check valve 86 and lines 81, 82, 60a so as to replenish fluid lost from chamber 32 as the result of an overstroking of piston 36 to the left.
  • left replenishing circuit 70 is automatically disconnected from chamber 34 by virtue of closure of check valve 84 in the manner aforedescribed.
  • fluid pump device 74 of the right-hand replenishing circuit 70 automatically compensates for any fluid lost in chamber 32 and that both replenishing circuits 70 are exceptionally sensitive to changes in the fluid volumes of various portions of the closed circuit.
  • the magnetic field F of the sensor immediately detects a greater counterreactance when a ram associated with the field enters a greater part thereof due to an overstroking of the ram as aforedescribed and instantaneously brings about the generation and transmission of the proper correcting signal to other parts of the device.
  • Chambers 32, 34, 46 and 38 are initially filled with fluid by the use of a pair of bleed valves 106 connected to the top of housing 12 through conduits 108 on opposite sides of actuating piston 36. Conduits 110, however, can operate to exhaust the bled fluid from valves 106 to reservoir 54. Fluid replenishing and pump devices 74 of both circuits 70 include ap limbate bleed valves (not shown) at opposite ends thereof for assuring proper filling of devices 74 prior to operation of the control system of the instant invention.
  • control system has been described in connection with the use of certain media, such as electrical signals for selectively directing excess and activated fluid under pressure from one chamber in order to effect admittance of activated fluid to a lost fluid chamber, e.g., as from 34 to 32 in the manner aforedescribed, during an overstroking of actuating piston 36
  • media such as electrical signals for selectively directing excess and activated fluid under pressure from one chamber in order to effect admittance of activated fluid to a lost fluid chamber, e.g., as from 34 to 32 in the manner aforedescribed, during an overstroking of actuating piston 36
  • the control system could readily use a fluidic-type sensor in lieu of each electromagnetic sensor 103 to generate and transmit electrical pulses to amplifiers 97.
  • An apparatus for forming a deep drawn seamless can body provided with a bottom and sidewall formed integrally therewith comprising a closed fluid circuit, an actuating piston mounted in one portion of said fluid circuit and at least one separate forming punch secured to each of the opposing sides of said piston, drive means located in another portion of said circuit for activating the fluid in said closed fluid circuit and the said piston so as to alternately urge first one of said punches in a single uninterrupted stroke thereof through the die means associated therewith and then an opposing punch in a single uninterrupted stroke of the last-mentioned punch through the die means associated therewith, means for replenishing fluid lost on one side of said piston and in a selected portion of the closed fluid circuit said lost fluid resulting in an unbalancing of the stroke of said piston, said fluid replenishing means including a fluid pump device connectable to the fluid deficient portion of the fluid circuit for supplying fluid to said fluid deficient portion of the fluid circuit, means including a valve means for fluidly connecting said fluid pump device directly to another portion of the closed fluid circuit so as to actuate said pump
  • An apparatus as set forth in claim 1 including an amplifier means connected to said sensor means.
  • valve means is operated by solenoids controlled by said amplifier means.
  • An apparatus as set forth in claim 1 including a pair of fluid pump devices, each of said devices being operable to supply fluid lost from a different selected portion of the fluid circuit to said different selected portion of the circuit and each of said pump devices being operated by a different valve means controlled by a separate sensor means.
  • e sensor means on each side of the apparatus and activated by a given verstroked punch for selectively and separately operating one of said valve means so as to connect a selected one of said pump devices to one side of said yoke-type drive means simultan. ously with connecting said last-mentioned pump device to a fluid deficient portion of the closed fluid circuit.
  • said yoke drive means includes a drive piston at each side of thc voketype drive means, each drive piston being in direct contact with the fluid in a given portion of said closed fluid circuit in order to effect reciprocation of the fluid in the closed circuit and reciprocation of said actuating piston.
  • each displacement pump device includes a pump piston which has a smaller diameter than a drive piston attached to said yoketype drive means.
  • An apparatus as set forth in claim 8 including oppositely disposed solenoid means operated by a sensor means for controlling each of said valve means and keeping said valve means in a ready condition at all times.
  • An apparatus as set forth in claim 8 including a further valve means for isolating one pump device from the fluid circuit when the other pump device is operating.
  • An apparatus for forming a deep drawn seamless can body provided with a bottom and sidewall formed integrally therewith and comprising a closed fluid circuit, a piston means mounted in one portion of said fluid circuit, at least one separate forming punch means secured to each of the opposing sides of said piston means, yoke means located in another portion of said circuit for cyclically activating portions of the fluid in said closed fluid circuit in order to actuate said piston means so as to alternately urge first one of said punch means in a single uninterrupted stroke of the punch means through a die means associated therewith and then an opposing punch means in a single uninterrupted stroke of the last-mentioned punch means through the die means associated therewith,
  • replenishing means including a sensor operatively associated with a punch means for detecting an overstroked punch means upon a fluid deficiency, the improvement comprising a sensor operated valve means for fluidly connecting a fluid pump device directly to a fluid activated portion of said fluid circuit simultaneously with connecting the same pump device to the fluid deficient portion of the fluid circuit whereby said pump device can in rapid fashion supply fluid to the fluid deficient part of the circuit upon the fluid deficiency being detected.
  • An apparatus as set forth in claim 14 including an amplifier means interconnecting said valve means and said sensor for placing said valve means in a ready condition at all times.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Presses (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US859997A 1969-09-22 1969-09-22 Control system for container manufacturing apparatus Expired - Lifetime US3599470A (en)

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US85999769A 1969-09-22 1969-09-22

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US3599470A true US3599470A (en) 1971-08-17

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US859997A Expired - Lifetime US3599470A (en) 1969-09-22 1969-09-22 Control system for container manufacturing apparatus

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US (1) US3599470A (enrdf_load_stackoverflow)
AU (1) AU1932170A (enrdf_load_stackoverflow)
DE (1) DE2046166A1 (enrdf_load_stackoverflow)
FR (1) FR2062479A5 (enrdf_load_stackoverflow)
GB (1) GB1276234A (enrdf_load_stackoverflow)
NL (1) NL7013526A (enrdf_load_stackoverflow)
ZA (1) ZA706022B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967482A (en) * 1975-03-17 1976-07-06 American Can Company Production of closed bottom shells

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2351725A1 (fr) * 1976-05-19 1977-12-16 American Can Co Machine de production de corps de boites a fond ferme, equipe d'un mecanisme a poincon et extracteur, et son procede de mise en oeuvre
FR2379047A1 (fr) * 1977-01-26 1978-08-25 American Can Co Detecteur de boite courte destine a une machine de production de corps de boites

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766590A (en) * 1951-10-18 1956-10-16 Ford Motor Co Fluid pressure system for motivating a reciprocating load
US3040533A (en) * 1960-02-25 1962-06-26 Celotex Corp Hydraulic pressure equalizing system
US3167044A (en) * 1958-04-14 1965-01-26 Kaiser Aluminium Chem Corp Forming apparatus
US3314274A (en) * 1964-01-23 1967-04-18 Kaiser Aluminium Chem Corp Apparatus for forming cup-shaped members
US3353394A (en) * 1963-04-29 1967-11-21 Kaiser Aluminium Chem Corp Apparatus for forming cup-shaped containers
US3457766A (en) * 1967-07-17 1969-07-29 Kaiser Aluminium Chem Corp Control system for container manufacturing device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766590A (en) * 1951-10-18 1956-10-16 Ford Motor Co Fluid pressure system for motivating a reciprocating load
US3167044A (en) * 1958-04-14 1965-01-26 Kaiser Aluminium Chem Corp Forming apparatus
US3040533A (en) * 1960-02-25 1962-06-26 Celotex Corp Hydraulic pressure equalizing system
US3353394A (en) * 1963-04-29 1967-11-21 Kaiser Aluminium Chem Corp Apparatus for forming cup-shaped containers
US3314274A (en) * 1964-01-23 1967-04-18 Kaiser Aluminium Chem Corp Apparatus for forming cup-shaped members
US3457766A (en) * 1967-07-17 1969-07-29 Kaiser Aluminium Chem Corp Control system for container manufacturing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967482A (en) * 1975-03-17 1976-07-06 American Can Company Production of closed bottom shells

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AU1932170A (en) 1972-03-02
FR2062479A5 (enrdf_load_stackoverflow) 1971-06-25
ZA706022B (en) 1972-04-26
GB1276234A (en) 1972-06-01
NL7013526A (enrdf_load_stackoverflow) 1971-03-24
DE2046166A1 (de) 1971-03-25

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