Dispensing package for fluid products and the like

• US 5,033,655 A
• Filed: 04/25/1989
• Issued: 07/23/1991
• Est. Priority Date: 02/15/1989
• Status: Expired due to Term

• Current Assignee: Seaquist Closures Foreign Inc (AptarGroup Incorporated)
• Original Assignee: Liquid Molding Systems, Inc. (AptarGroup Incorporated)
• Inventors: Brown, Paul E.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Merritt, Karen B.
• Application Number:
  US07/343,464
• Time in Patent Office: 819 Days
• Field of Search: 222/494, 222/491, 222/490, 222/212, 285/382, 285/423, 403/274, 403/284
• US Class Current: 222/212
• CPC Class Codes: B29C 65/568 using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/131 Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
• CPC Class Codes: B29C 66/135 Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
• CPC Class Codes: B29C 66/21 said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
• CPC Class Codes: B29C 66/24221 being circular B29C66/51 takes precedence
• CPC Class Codes: B29C 66/5344 said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends B29C66/5346 takes precedence
• CPC Class Codes: B29C 66/53461 joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
• CPC Class Codes: B29C 66/542 joining hollow covers or hollow bottoms to open ends of container bodies
• CPC Class Codes: B29C 66/61 Joining from or joining on the inside for making tubes by bending sheets and joining from the inside B29C53/387
• CPC Class Codes: B29C 66/7392 characterised by the material of at least one of the parts being a thermoplastic
• CPC Class Codes: B29C 66/73941 characterised by the materials of both parts being thermosets
• CPC Class Codes: B29L 2031/565 for containers
• CPC Class Codes: B65D 35/12 Connections between body and closure-receiving bush
• CPC Class Codes: B65D 47/2031 the element being formed by a slit, narrow opening or constrictable spout, the size of the outlet passage being able to be varied by increasing or decreasing the pressure B65D47/2025 takes precedence

Abstract

A dispensing package is provided for fluid products, such as liquids, pastes, powders and the like. The package comprises a container in which the product is packaged, and a self-sealing dispensing valve which automatically opens and closes in response to the application and removal of a predetermined threshold pressure. A removable closure may be provided to cover the dispensing valve and prevent inadvertent discharge of the product during transport, storage and other similar conditions.

Claims

1. A dispensing package for fluid materials and the like, comprising:

a container shaped to retain a preselected fluid product therein, and including a discharge opening with a marginal lip, and manually elastically deformable walls for selectively moving the fluid product in said container through said discharge opening;

a self-sealing dispensing valve positioned to communicate with the discharge opening of said container, and including a slit center portion defining an orifice which automatically opens in response to a predetermined threshold pressure, and automatically closes upon removal of the predetermined threshold pressure;

said valve central portion being constructed such that said predetermined threshold pressure is greater than the maximum hydraulic head pressure of the fluid product in said container when said discharge opening is oriented downwardly;

said dispensing valve including a retainer flange disposed marginally about said orifice, and being resiliently deformable between opposite faces thereof;

one of the faces of said dispensing valve flange being positioned on the lip of said container, and oriented such that said orifice communicates with said discharge opening;

a retainer ring formed integrally in said container adjacent the discharge opening thereof, and including a crimpable collar constructed from a thermosetting plastic which is heated and inelastically deformed about the flange of said dispensing valve to form a rim which abuttingly engages the other face of said dispensing valve flange and compresses said dispensing valve flange between the lip of said container and the rim of said retainer ring to securely mount said dispensing valve on said container, and simultaneously form a leak resistance seal therebetween; and

wherein

said dispensing valve has a one-piece, integral construction molded from liquid silicone rubber, whereby said flange is elastically compressible, yet will not inelastically deform during heat setting of said retainer ring collar.

2. A self-sealing dispenser as set forth in claim 1, wherein:

said container includes a bottom wall with a base portion adapted to abuttingly support said container on a surface, and a recessed portion in which said discharge opening is disposed; and

said dispensing valve is mounted in the recessed portion of said container bottom wall.