Package making – With cover-adjunct application or formation – Adjunct comprising provision to allow access to contents,...
Patent
1994-07-15
1996-08-20
Coan, James F.
Package making
With cover-adjunct application or formation
Adjunct comprising provision to allow access to contents,...
53412, 222107, B65D 7536
Patent
active
055467288
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention concerns a device constituting packaging for quantities of a glutinous substance.
2. Background Art
A device of this kind and the process for manufacture of said device have been described in patent application No. WO-A-9111371 in the name of the present Applicant.
This prior document discloses a device for storage and distribution of quantities of a glutinous substance, comprising a volume used to hold the quantity of glutinous substance and means for sealing this volume, which can be opened for distribution of the quantity of glutinous substance, this device being made of two superposed sheets solidly joined together, of which the first, formable sheet comprises, for each quantity, a deformation extending away from the junction surface joining the two sheets and existing as a cavity forming the volume in which the glutinous substance is held, this device further comprising a duct for the expulsion of the quantity of glutinous substance and forming a nonsoldered, passage-shaped area arranged between the first sheet incorporating the cavity and the second sheet, this duct being open at one of its ends and opening at the other end into the cavity, and a flexible membrane constituting sealing means and separating the cavity from the duct and which, in the duct area, is assembled to said first sheet in which the cavity is formed in order to produce, at that site, a seal which is fragile or can be easily be torn open. These components form part of the device according to the present invention.
However, in this prior document the second sheet incorporates, prior to soldering this second sheet to the first, a second deformation in the form of a passage forming an expulsion duct and also extending away from the junction surface at which the sheets are joined.
The presence of this second passage-shaped deformation extending away from the cavity in which the quantity of glutinous substance is held makes possible the use of a flat membrane which, arranged in the plane of the junction of the first and second sheets, produces the separation between the cavity and the passage arranged on either side of this plane of junction.
This passage, which projects outward on the package surface opposite the cavity in which the quantity of glutinous substance is held, on the one hand complicates production of the device, and, on the other, increases the bulk of the packaging.
DISCLOSURE OF THE INVENTION
The invention is thus intended to solve these difficulties by producing a packaging of the aforementioned type, in which, in the area of the duct for expulsion of the quantity of glutinous substance, one of two possible assemblies exist. In the first assembly, neither of the first and second sheets is deformed and the expulsion duct is formed exclusively as a result of the existence of the non-soldered area. In the second assembly, the first sheet is deformed, the flexible membrane assuming the shape of this deformation of the first sheet in the area in which it is attached to it and the second sheet comprises a flat sheet having a stiffness greater than that of the first sheet.
According to a preferred embodiment of the invention, the fragile or easily-tearable seal formed within the expulsion duct by the membrane attached to said first sheet incorporating the cavity is produced by effecting a fragile attachment of the membrane to said first sheet.
According to another feature of the invention, the fragile seal formed within the expulsion duct by the membrane assembled to said first sheet incorporating the cavity is formed by a prenotched weakened zone produced in the membrane.
The invention also relates to the process for manufacture of a device of this kind.
The aforementioned prior document No. WO-A-9111371 also describes a process for manufacture of a device constituting the packaging for quantities of a glutinous substance, in which cavities are produced in the first sheet made of a formable material; the cavities are filled with quantities of a glutino
REFERENCES:
patent: 2705579 (1955-04-01), Mason
patent: 2908601 (1959-10-01), Brown
patent: 2956710 (1960-10-01), O'Connor
patent: 3917116 (1975-11-01), Mason
patent: 4331264 (1982-05-01), Staar
patent: 4493574 (1985-01-01), Redmond et al.
patent: 4611715 (1986-09-01), Redmond
patent: 4793121 (1988-12-01), Jamison
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