US3132570A - Piston construction for an aerosol container - Google Patents

Piston construction for an aerosol container Download PDF

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Publication number
US3132570A
US3132570A US63338A US6333860A US3132570A US 3132570 A US3132570 A US 3132570A US 63338 A US63338 A US 63338A US 6333860 A US6333860 A US 6333860A US 3132570 A US3132570 A US 3132570A
Authority
US
United States
Prior art keywords
piston
wall
container
product
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US63338A
Other languages
English (en)
Inventor
Jr Henry Tice Hoffman
Jackson John Mathews
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primerica Inc
Original Assignee
American Can Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL270347D priority Critical patent/NL270347A/xx
Application filed by American Can Co filed Critical American Can Co
Priority to US63338A priority patent/US3132570A/en
Priority to GB36628/61A priority patent/GB1002040A/en
Priority to FR876021A priority patent/FR1303812A/fr
Priority to CH1196561A priority patent/CH377062A/fr
Priority to BE609238A priority patent/BE609238A/fr
Priority to DE19611432447 priority patent/DE1432447A1/de
Application granted granted Critical
Publication of US3132570A publication Critical patent/US3132570A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/60—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant with contents and propellant separated
    • B65D83/64—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant with contents and propellant separated by pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant

Definitions

  • the present invention pertains to a movable wall member within a container adapted to dispense products therefrom by its movement. More particularly, it pertains to a cup-shaped, lfree piston adapted to dispense a viscous product disposed on one side thereof in a container upon its movement under the impetus of a pressure producing gas, also enclosed within the container and disposed on the opposite side of the piston.
  • the prior art discloses a -wide variety of pressure or aerosol-type containers for the packaging and dispensing of viscous products, such as toothpaste, mayonnaise, mustard, and the like.
  • viscous products such as toothpaste, mayonnaise, mustard, and the like.
  • the product is separated from the gaseous propellant by means of a movable wall or piston.
  • the pressure generated by the gaseous propellant moves the piston longitudinally within the ⁇ container, forcing the viscous product through the dispensing orifice and out of the container.
  • pistons having various constructions and configurations have been designed.
  • all of these prior art configurations rely in one way or another upon tight engagement between the outside surface of the piston and the inside surface of the container.
  • Such a construction often leads to jamming of the piston within the container due to irregularities in the container wall, such as dents, or
  • Another object is to provide a piston for a container of the character described which is relatively simple and inexpensive to manufacture.
  • a piston for use in an aerosol-type container which piston has a substantially cylindrical but slightly tapered body, the maximum diameter thereof being slightly less than the interior diameter of the can with which it is to be utlized, an ⁇ arcuate wall integral with the smaller diameter end of the body curving appreciably inwardly to merge and be integral with la piston face.
  • FIGURE l is an elevational view ⁇ partly in section showing the piston of the present invention mounted within an aerosol-type container;
  • FIG. 2 is lan enlarged sectional View taken substantially along line 2 2 of FlG. l;
  • FIG. 3 is a sectional view maken substantially along line 3--3 of FIG. 2.
  • FIG. 'l shows a metal can generally designated 10 having fa cylindrical body 111 with upper and lower ends 13, ⁇ 14 respectively.
  • the can 10 illustrated is of three-piece construction wherein the upper and lower ends 13, 14 are attached to the body E11 by means of conventional double seams 15, 16.
  • the can 10l may be of two-piece construction wherein one end and the body are one piece, formed such as by drawing or impact extrusion, and the other end is secured to the body by an end seam.
  • Mounted in lche upper end 13 is a conventional aerosol dispensing valve 17. Any construction well known in the lart may fbe used for the dispensing valve 17, such as that shown in U.S.
  • a viscous product 18, such as toothpaste Adjacent the lower end 14 and extending across the can body 11 is a piston 20 composed of a plastic such as polyethylene, preformed, such as by injection molding, prior to assembly with the can 10 into a cup shape that will be described more flully hereinafter.
  • a gaseous propellant 21, such as nitrogen gas Beneath the piston 20 and separated from the product by the piston is a gaseous propellant 21, such as nitrogen gas.
  • a plug 23 composed of .rubber or some similar soft material.
  • the gaseous propellant 21 is introduced into the container, after placement of the piston and Ifilling of the product, through the hole 22, either before the plug 23 is mounted therein or ⁇ after its mounting by means of a hypodermic needle inserted therethrough.
  • the gas 21 maintains the pressure within the container -substantially yabove atmospheric, usually about ⁇ 100 lbs. per square inch. Actuation of the dispensing valve 517 unbalances the forces on either side of the piston whereby the piston moves upwardly due to l'the pressure of the gaseous propellant, thereby dispensing the product 18 until the valvey 17 is closed.
  • the piston 20 has a substantially cylindrical but slightly tapered body 25, the maximum diameter of which is slightly less than the internal diameter of the can with which it is to be utilized.
  • the wall of the body 25 is relatively thin, from .017 inch to .025 inch, and preferably about .020 inch thick, and quite exible.
  • the flexibility is essential, so that should there be irregularities in the side wall of the can body 11, such as a dent, the piston body wall may deflect inwardly around such irregularities without catching or jamming thereagainst.
  • the relationship between the piston body 25 and the can wall 11 is shown in the dot-dash lines in FIG. 3, with the indentation 26 representing the type of irregularity discussed immediately above. It is to be understood that due to the inherent structural rigidity of the can and relatively high internal pressure within the can, large dents are highly unlikely to occur, so that the flexibility of the piston body 25 is more than adequate to compensate for small dents such as 26.
  • piston face 28 Integral with the smaller diameter end of the piston body 25 is an arcuate wall 27 which curves appreciably inwardly toward and is integral with a piston face generally designated 28.
  • the piston face 28 is composed of a horizontal wall 29 extending transversely of the piston body 25 and a sloping wall 3i) joining the horizontal wall 29 to the arcuate wall 27.
  • the piston face 28 will be contoured to t relatively snugly over and around the portion of the valve 17 extending into the can 1t) so that the maximum amount of product will be dispensed from the can. Therefore, the particular shape of the piston face 28 may vary depending upon the particular shape of the valve 17.
  • the appreciable curvature of the arcuate wall 27 is an essential and critical element of the instant invention. Due to this curvature, product in contact therewith is conducted in a smooth, even ow into the small :space existing between the outside surface of the piston body 25 and the inside surface of the container, thereby facilitating the Vformation of a sealing-lubricating layer or iilm between the piston body and can body.
  • the outward taper of the piston body wall 2S from its juncture with the arcuate Wall 27 toward its free end is desirable to leave as thin a film as possible of the product between the piston and the can body wall so as to dispense the maximum amount of product from the container.
  • the maximum diameter of the piston is slightly less than the internal diameter of the can body. With this construction, the piston does not scrape the can body wall clean, but leaves behind a thin iilm of product.
  • the arcuate wall 27 and piston face 28 are of substantially equal thickness and are substantially thicker and more rigid than the piston body 25. This greater rigidity, especially of the wall 27, is essential to minimize, if not prevent, deformation of the predetermined and critical shape of the wall 27 and face 28. Conditions tending Vto cause such deformation are the pressure of propellant gas, the weight of the product, vacuumizing or deaeration of the container immediately prior to pressurizing with propellant, or the heated state of the product if a hot-fill operation is used.
  • the extra thickness and rigidity of the wall 27 enables it to resist such deformation. On the other hand, due to its appreciably curved surface, it can ride over any irregularities in the can body, such as the definitely preferred that the piston face 28 as Well as the arcuate wall 27 be of equal thickness and be substantially more rigid than the piston body 25.
  • the container embodying the piston of the instant invention is mass produced by modern, high-speed production methods. To this end, the subject pistons are fed into an assembling machine from a hopper containing the pistons in a random bulk load.
  • the ribs 31 prevent adjacent pistons in such a load from nesting or telescoping so that each piston may be readily released from the load and fed into the assembly machine. It is also believed that the ribs 31 provide some expansion resistance to the piston bady wall, while at the same time permitting ready exing of the piston body 25 from the top to the bottom thereof.
  • the expansion resistance provided by the ribs 31 restricts ballooning of the piston body 25' at its inidpoint due to the internal pressure of the lgaseous propellant 2l. Such ballooning would tend to force the central and upper portion of the piston body 25 into intimate Contact with the can wall 11, thereby inhibiting the formation of the sealing-lubricating layer or film of product.
  • a free piston for acting on conned viscous uids comprising an elongated tubular body having a thin, ilexible wall, and a rigid end wall integral with and closing one end of said body to form a unitary cup-shaped configuration therewith, said end wall being substantially thicker than said body and comprising a face ⁇ and a peripheral arcuate portion which merges with said flexible body wall in a substantially tangential juncture and extends radially inwardly therefrom with appreciable curvature toward the axis of said piston to deiine asmooth, continuous flow control surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
US63338A 1960-10-18 1960-10-18 Piston construction for an aerosol container Expired - Lifetime US3132570A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL270347D NL270347A (is") 1960-10-18
US63338A US3132570A (en) 1960-10-18 1960-10-18 Piston construction for an aerosol container
GB36628/61A GB1002040A (en) 1960-10-18 1961-10-12 Pressure dispensing device for viscous products
FR876021A FR1303812A (fr) 1960-10-18 1961-10-16 Récipient distributeur à pression pour produits visqueux
CH1196561A CH377062A (fr) 1960-10-18 1961-10-16 Appareil à pression pour la distribution d'un produit visqueux
BE609238A BE609238A (fr) 1960-10-18 1961-10-17 Dispositif distributeur à pression
DE19611432447 DE1432447A1 (de) 1960-10-18 1961-10-18 Druckspritzvorrichtung fuer viskose Stoffe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63338A US3132570A (en) 1960-10-18 1960-10-18 Piston construction for an aerosol container
US8569061A 1961-01-30 1961-01-30

Publications (1)

Publication Number Publication Date
US3132570A true US3132570A (en) 1964-05-12

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ID=26743294

Family Applications (1)

Application Number Title Priority Date Filing Date
US63338A Expired - Lifetime US3132570A (en) 1960-10-18 1960-10-18 Piston construction for an aerosol container

Country Status (6)

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US (1) US3132570A (is")
BE (1) BE609238A (is")
CH (1) CH377062A (is")
DE (1) DE1432447A1 (is")
GB (1) GB1002040A (is")
NL (1) NL270347A (is")

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245591A (en) * 1964-02-20 1966-04-12 Crown Cork & Seal Co Dispensing piston can
US3258163A (en) * 1964-08-04 1966-06-28 Edward E Brush Low pressure dispensing container
US3433134A (en) * 1967-11-22 1969-03-18 Colgate Palmolive Co Piston for aerosol dispensers
US3563258A (en) * 1967-10-26 1971-02-16 Valentine Hechler Disposable hermetically sealed container and method
US3901416A (en) * 1971-08-26 1975-08-26 Robert S Schultz Top-loaded pressure operated container for dispensing viscous products
US3915352A (en) * 1974-09-11 1975-10-28 Christian T Scheindel Aerosol can and piston assembly
US4023717A (en) * 1974-04-09 1977-05-17 Schultz Robert S Pressure-operated container for viscous products
US4106674A (en) * 1975-09-24 1978-08-15 Schultz Robert S Pressure-operated container for viscous products
EP0081014A1 (en) * 1981-12-04 1983-06-15 Clayton Corporation Pressurised dispensing apparatus
US4579259A (en) * 1982-06-05 1986-04-01 K.K. Hayashibara Seibutsu Kagaku Yufo Composition for sealing sliding contact section
US4683150A (en) * 1982-06-05 1987-07-28 Katsumi Hirao Composition for sealing sliding contact section
US4703875A (en) * 1986-07-24 1987-11-03 S. C. Johnson & Son, Inc. Low mass piston for aerosol container
US4913323A (en) * 1986-09-29 1990-04-03 Schneindel Associates, Inc. Stepped piston for pressure operated dispensing container
US5007556A (en) * 1990-04-18 1991-04-16 Block Drug Company, Inc. Metering dispenser
US5127556A (en) * 1991-07-17 1992-07-07 United States Can Company Low mass piston system for necked-in aerosol cans
US5419466A (en) * 1992-09-04 1995-05-30 Scheindel; Christian T. Bowed piston for a pressure operated container
US20040065691A1 (en) * 2000-11-03 2004-04-08 Vilmos Weiperth Packaging unit for the storage and dispensing of liquids, fluid and ductile materials
US20080272128A1 (en) * 2004-01-20 2008-11-06 Yasuaki Norimatsu Fuel Container For Fuel Cell
US20120024911A1 (en) * 2009-02-06 2012-02-02 Illinois Tool Works Inc. Dispensing device for dispensing a liquid gas formulation in a metered manner and method for producing the dispensing device
WO2023027870A1 (en) * 2021-08-22 2023-03-02 Hoa Ly Container

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078936B1 (de) * 1981-11-06 1986-05-28 Polypag Ag Druckdose zum Ausbringen von Montageschäumen, insbesondere Einkomponentenpolyurethanschaum
DE102011011352B4 (de) * 2011-02-16 2013-06-06 NOAFLEX GmbH Reibungsgeminderter Füllgütbehälter mit gummielastischem Krafterzeugungskörper zur Aufnahme des Füllguts

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1362838A (en) * 1920-07-15 1920-12-21 Wayne Oil Tank And Pump Compan Pump-piston
US2410405A (en) * 1945-01-01 1946-11-05 Richard T Cornelius Piston
US2429426A (en) * 1942-09-14 1947-10-21 Bendix Aviat Corp Piston seal
US2653746A (en) * 1952-12-17 1953-09-29 Macdonald Robert Measuring and filling device
US2735735A (en) * 1956-02-21 Syringe construction
US3022923A (en) * 1958-03-21 1962-02-27 American Can Co Dispensing container for viscous products

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735735A (en) * 1956-02-21 Syringe construction
US1362838A (en) * 1920-07-15 1920-12-21 Wayne Oil Tank And Pump Compan Pump-piston
US2429426A (en) * 1942-09-14 1947-10-21 Bendix Aviat Corp Piston seal
US2410405A (en) * 1945-01-01 1946-11-05 Richard T Cornelius Piston
US2653746A (en) * 1952-12-17 1953-09-29 Macdonald Robert Measuring and filling device
US3022923A (en) * 1958-03-21 1962-02-27 American Can Co Dispensing container for viscous products

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245591A (en) * 1964-02-20 1966-04-12 Crown Cork & Seal Co Dispensing piston can
US3258163A (en) * 1964-08-04 1966-06-28 Edward E Brush Low pressure dispensing container
US3563258A (en) * 1967-10-26 1971-02-16 Valentine Hechler Disposable hermetically sealed container and method
US3433134A (en) * 1967-11-22 1969-03-18 Colgate Palmolive Co Piston for aerosol dispensers
US3901416A (en) * 1971-08-26 1975-08-26 Robert S Schultz Top-loaded pressure operated container for dispensing viscous products
US4023717A (en) * 1974-04-09 1977-05-17 Schultz Robert S Pressure-operated container for viscous products
US3915352A (en) * 1974-09-11 1975-10-28 Christian T Scheindel Aerosol can and piston assembly
US4106674A (en) * 1975-09-24 1978-08-15 Schultz Robert S Pressure-operated container for viscous products
EP0081014A1 (en) * 1981-12-04 1983-06-15 Clayton Corporation Pressurised dispensing apparatus
US4683150A (en) * 1982-06-05 1987-07-28 Katsumi Hirao Composition for sealing sliding contact section
US4579259A (en) * 1982-06-05 1986-04-01 K.K. Hayashibara Seibutsu Kagaku Yufo Composition for sealing sliding contact section
US4703875A (en) * 1986-07-24 1987-11-03 S. C. Johnson & Son, Inc. Low mass piston for aerosol container
EP0254258A3 (en) * 1986-07-24 1988-11-17 S.C. Johnson & Son, Inc. Low mass piston for aerosol can
US4913323A (en) * 1986-09-29 1990-04-03 Schneindel Associates, Inc. Stepped piston for pressure operated dispensing container
US5007556A (en) * 1990-04-18 1991-04-16 Block Drug Company, Inc. Metering dispenser
US5127556A (en) * 1991-07-17 1992-07-07 United States Can Company Low mass piston system for necked-in aerosol cans
US5419466A (en) * 1992-09-04 1995-05-30 Scheindel; Christian T. Bowed piston for a pressure operated container
US20040065691A1 (en) * 2000-11-03 2004-04-08 Vilmos Weiperth Packaging unit for the storage and dispensing of liquids, fluid and ductile materials
US6799701B2 (en) 2000-11-03 2004-10-05 Vilmos Weiperth Packaging unit for the storage and dispensing of liquids, fluid and ductile materials
US20080272128A1 (en) * 2004-01-20 2008-11-06 Yasuaki Norimatsu Fuel Container For Fuel Cell
US20120024911A1 (en) * 2009-02-06 2012-02-02 Illinois Tool Works Inc. Dispensing device for dispensing a liquid gas formulation in a metered manner and method for producing the dispensing device
US9038864B2 (en) * 2009-02-06 2015-05-26 Illinois Tool Works Inc. Dispensing device for dispensing a liquid gas formulation in a metered manner and method for producing the dispensing device
WO2023027870A1 (en) * 2021-08-22 2023-03-02 Hoa Ly Container

Also Published As

Publication number Publication date
NL270347A (is")
CH377062A (fr) 1964-04-30
DE1432447A1 (de) 1968-12-12
GB1002040A (en) 1965-08-18
BE609238A (fr) 1962-02-15

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