EP0261645A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rigid container, particularly of glass, having a screw closure device
Assignee: Alplast SRL
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Filing: 1987-09-22
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Granted: —
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Expires: 2007-09-22
Abstract
Abstract The mouth (1) of a rigid container, particularly of glass, having a screw closure device and usable for food products intended to be subjected to heat treatment in the container to preserve them, is provided with an annular rib (3) of triangular profile below the threading (2). Screwed onto the mouth (1) is a rigid plastics capsule having a plastic mastic sealing coating (T) on the inner surface of its top (7) and incorporating in its peripheral skirt (8) a tearing band (11, 111, 211) for opening. The lower part (12) of the cylindrical skirt (8) of the capsule constitutes a security seal and has an inner annular engagement rib (13) which snap-engages beneath the annular rib (3) of the mouth (1).
Inventors
- 👤 Mario Margaria
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 01:51
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/3442; B65D41/3447; B65D2401/00; B65D2401/15; B65D2401/25
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
290 words
A rigid container, particularly of glass, for food products intended to be subjected to a heat treatment at a relatively high temperature after their introduction into the container, the container being provided with a mouth having threading on which a screw closure device engages, characterized in that: - the outer surface of the mouth (1) of the container has, below its threading (2), an annular rib (3) with a triangular profile comprising an upper frusto-conical surface (4) diverging towards the base of the container and a substantially radial lower surface (5) connecting the larger base of the frustum to a lower cylindrical portion (6) of the mouth (1), - the screw closure device consists of a capsule with a security seal (12) and a tearable opening band (11, 111, 211), the capsule being made from a rigid-plastics material which can withstand the treatment temperatures in use, the capsule having a flat top (7) and a cylindrical skirt (8), - the capsule had, on the inner surface of its flat top (7), a plastic mastic coating (T) for forming a seal with the edge of the mouth (1) of the container, - the tearable opening band (11) is incorporated in an intermediate part of the cylindrical skirt (8) of the capsule and the tearing of this band is achieved by the exertion of a pull on a gripping portion (11a) of the band itself, - the security seal is formed by a lower part (12) of the skirt (8) of the capsule having, on its inner surface, an annular engagement rib (13) which snap-engages beneath the lower surface of the annular rib (3) of the mouth (1) of the container as a result of the first screwing on of the capsule.
Claim 2
Dependent Claim
290 words
A rigid container, particularly of glass, for food products intended to be subjected to a heat treatment at a relatively high temperature after their introduction into the container, the container being provided with a mouth having threading on which a screw closure device engages, characterized in that: - the outer surface of the mouth (1) of the container has, below its threading (2), an annular rib (3) with a triangular profile comprising an upper frusto-conical surface (4) diverging towards the base of the container and a substantially radial lower surface (5) connecting the larger base of the frustum to a lower cylindrical portion (6) of the mouth (1), - the screw closure device consists of a capsule with a security seal (12) and a tearable opening band (11, 111, 211), the capsule being made from a rigid-plastics material which can withstand the treatment temperatures in use, the capsule having a flat top (7) and a cylindrical skirt (8), - the capsule had, on the inner surface of its flat top (7), a plastic mastic coating (T) for forming a seal with the edge of the mouth (1) of the container, - the tearable opening band (11) is incorporated in an intermediate part of the cylindrical skirt (8) of the capsule and the tearing of this band is achieved by the exertion of a pull on a gripping portion (11a) of the band itself, - the security seal is formed by a lower part (12) of the skirt (8) of the capsule having, on its inner surface, an annular engagement rib (13) which snap-engages beneath the lower surface of the annular rib (3) of the mouth (1) of the container as a result of the first screwing on of the capsule.
Claim 3
Dependent Claim
25 words
A rigid container with a screw closure according to Claim 1, characterized in that the capsule is produced by moulding from a filled polypropylene resin.
Claim 4
Dependent Claim
64 words
A rigid container with a screw closure according to Claim 1, characterized in that the upper frusto-conical surface (4) of the annular rib (3) of the mouth (1) of the container is inclined by about 30° to the axis of the mouth, and in that the lower surface (5) of this rib is inclined by about 8° to a plane perpendicular to this axis.
Claim 5
Dependent Claim
118 words
A rigid container with a screw closure according to Claim 1, characterized in that the annular engagement rib (13) carried by the security seal (12) of the capsule projects from the cylindrical internal surface of the skirt (8) of the capsule by a distance (A) equal to about half the projection (B) of the annular rib (3) of the mouth of the container from the lower cylindrical portion (6) of the mouth, so that, when the lower part (12) of the skirt (8) is separated from the remaining part of the capsule due to the tearing of the tearing band (11, 111, 211), the ring thus obtained can be easily removed from the mouth (1) of the container.
Claim 6
Dependent Claim
70 words
A rigid container with a screw closu re according to Claim 1, characterized in that the intermediate part of the skirt (8) of the capsule has, on its outer surface two deep annular weakening grooves (15) which are spaced axially from each other to define the major part of the circumferential extent of the tearing band (11) and are shaped so as to give the band (11) a trapezoidal cross-section.
Claim 7
Dependent Claim
71 words
A rigid container with a screw closure according to Claim 1, characterized in that the tearing band (11) of the capsule has a gripping zone (11a) connected to the skirt (8) by two series of trapezoidal bridges (15) whose larger bases are on the band and has an enlarged end (16) which is bevelled at 45° to facilitate its detachment by raising from the adjacent thin part (17) of the band.
Claim 8
Dependent Claim
45 words
A rigid container with a screw closure according to Claim 1, characterized in that the tearing band (111, 211) of the capsule is obtained by the moulding of a propylene resin filled with a mineral filler and having a hardness greater than 75 Shore D.
Claim 9
Dependent Claim
52 words
A rigid container with a screw closure according to Claim 1, characterized in that the tearing band (111, 211) of the capsule extends, at least in part, inwardly of the cylindrical skirt (8) of the capsule relative to the two weakened zones (18) which connect the band (111, 211) to the skirt.
Claim 10
Dependent Claim
110 words
A rigid container with a screw closure according to Claim 8, characterized in that the cross-section of the tearing band (111) of the capsule has an outer part (111a) which is substantially trapezoidal in shape and is defined by two grooves (14) formed in the outer surface of the skirt (8) of the capsule and form the two weakened zones (18), the outer trapezoidal part (111a) having its larger base in correspondence with the bottoms of the two grooves (14), the tearing band (111) also having an inner part (111b) which extends inwardly of the skirt (8) of the capsule from the larger base of the trapezoidal outer part (111a).
Claim 11
Dependent Claim
41 words
A rigid container with a screw closure according to Claim 9, characterized in that the cross-section of the inner part (111b) of the tearing band (111) is defined by a line (20) which is curved towards the inside of the capsule.
Claim 12
Dependent Claim
50 words
A rigid container with a screw closure according to Claim 9, characterized in that the substantially trapezoidal outer part (111a) of the cross-section of the tearing band (111) of the capsule has a recess (19) in correspondence with the smaller base of the trapezium facing the outside of the capsule.
Claim 13
Dependent Claim
38 words
A rigid container with a screw closure according to Claims 8 to 11, characterized in that the neutral axis of the cross-section of the tearing band (111) of the capsule corresponds substantially with the two weakened zones (18).
Claim 14
Dependent Claim
23 words
A rigid container with a screw closure according to Claim 8, characterized in that the weakened zones (18) of the capsule are continuous.
Claim 15
Dependent Claim
48 words
A rigid container with a screw closure according to Claim 8, characterized in that the two weakened zones (18) of the capsule are interrupted and consist of a plurality of a spaced bridges separated from each other by apertures formed in the cylindrical skirt (8) of the capsule.
Claim 16
Dependent Claim
57 words
A rigid container with a screw closure according to Claim 8, characterized in that the entire tearing band (211) of the cap is situated inwardly of the skirt (8) of the capsule relative to the weakened zones (18) and is defined by two grooves (114) formed in the inner surface of the skirt (8) of the capsule.
Claim 17
Dependent Claim
45 words
A rigid container with a screw closure according to Claim 15, characterized in that the tearing band (211) if substantially trapezoidal in cross-section, having its larger base situated in correspondence with the weakened zones (18) and its smaller base facing the inside of the capsule.
Claim 18
Dependent Claim
23 words
A rigid container with a screw closure according to Claim 15, characterized in that the weakened zones (18) of the capsule are continuous.&
Claim 19
Dependent Claim
43 words
A rigid container with a screw closure according to Claim 15, characterized in that the two weakened zones (18) are interrupted and consist of a plurality of spaced bridges separated from each other by apertures formed in the skirt (8) of the capsule.
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GB1520808A
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US4342400A
Cited
WO1984000346A1
Cited
US4550843A
Cited
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