US3019936A - Unbreakable and impervious ring of moulded synthetic material for package tins - Google Patents

Unbreakable and impervious ring of moulded synthetic material for package tins Download PDF

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Publication number
US3019936A
US3019936A US72233A US7223360A US3019936A US 3019936 A US3019936 A US 3019936A US 72233 A US72233 A US 72233A US 7223360 A US7223360 A US 7223360A US 3019936 A US3019936 A US 3019936A
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US
United States
Prior art keywords
ring
strip
tongue
tin
unbreakable
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
US72233A
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English (en)
Inventor
Maulaz Georges
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.)
Satrametal S A
Original Assignee
Satrametal S A
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
Application filed by Satrametal S A filed Critical Satrametal S A
Application granted granted Critical
Publication of US3019936A publication Critical patent/US3019936A/en
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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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/30—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness using cutting devices

Definitions

  • These rings are provided, on the one hand, with two peripheral grooves defining between them a strip designed to be torn away when the tin is opened for the first time and, on the other hand, a tongue integral with the portion included between the two grooves, this tongue serving to tear this strip.
  • the moulding must be effected by means of a slide mould and the problem is to give the tongue such a shape that once the ring and the tongue have been moulded into a single element, the mould may be opened, that is to say that the slides may be separated from the core of the mould. Up to the present, these difiiculties have not been solved.
  • the invention aims at providing a ring of such shape that these difliculties disappear. It has for object an unbreakable and impervious ring, of the type indicated, which is characterized in that the above mentioned strip is provided, in its part adjacent to the base of the tongue, over its whole width, with a thickness which diminishes progressively up to this base, in order to facilitate the initial stage of the tearing, the outer surface of the strip in the part thus thinned being tangential, at the point of minimum thickness of this strip, to a cylinder coaxial to the ring.
  • FIG. 1 is a perspective view showing a part of a cylindrical metallic tin provided with its lid and with this embodiment of the ring.
  • FIG. 2 is a partial longitudinal view in section, on a large scale, of the tin, its lid and the ring.
  • FIG. 3 is a partial cross sectional view of the slide mould employed in the manufacture of the ring according to FIGS. 1 and 2 showing the closed mould and the ring which has just been moulded therein.
  • FIG. 4 shows the same members as FIG. 3 but in the open position of the mould, while the ring is still on the core of the mould.
  • FIG. 5 is a view along 5-5 of FIG. 4.
  • FIG. 6 is a partial cross sectional view of'the ring visible in FIGS. 3 and 4 but after deformation of the tongue.
  • the ring 1 is of moulded synthetic material and it is designed to be fixed, by a setting 2, on the body 3 of a cylindrical metallic tin. It is designed to be fixed, on the other hand, by a setting 4, on a lid 5, also metallic and closing this tin.
  • This ring has for function to join as one the tin body 3 and the lid 5, to ensure a vacuumtight closure of the tin and moreover to guarantee the unbreakability of the tin.
  • unbreakability is to be understood, according to custom, that the tin cannot be opened without destruction of the entirety of the ring, thus preventing any fraudulent opening and reclosing of the tin.
  • the ring 1 is provided, as is known, with two peripheral 3,619,936 Patented Feb. 6, 1962 tearing grooves 6, 7, parallel, defining between them a strip 8 designed to be torn when the tin is opened for the first time. It is obvious that, at the time of this tearing, the ring is torn along the grooves 6 and 7. A tongue 9, of a piece with the ring 1 and integral with the strip 8, serves to tear this strip.
  • the strip 8 which is seen in cross section in FIGS. 3 and 4, is provided, in its part adjacent to the base 10 of the tongue 9, over its whole width, with a thickness diminishing progressively up to this base, in order to facilitate the initial stage of the tearing.
  • the outer surface 110i the strip 8, in the part thus thinned, is tangential, at the point 12 of minimum thickness of the strip, to a geometrical cylinder coaxial to the ring.
  • junction-line of the base 10 of the tongue 9 with I the strip 8, on the side where the latter is thinned, has
  • the slide 17 forming an outer element of the mould comprises a bladeshaped part 2% having two surfaces 21, 22 of general flat form and parallel. These surfaces are further parallel to the direction of the reciprocating motion of this slide.
  • these surfaces 21, 22 are tangential to geometrical cylinders coaxial to the core of the mould.
  • the surface 21 is provided to form the surface 11, that is to say the thinned part of the tearing strip 8, whereas the surface 22 is provided to form the inner surface 23 of the tongue 9. Due to this tangential arrangement of the surfaces 21 and 22, it is ohviousthat the slide 17 may be separated from the core after moulding, without any difficulty. This arrangement gives a particularly simple and reliable solution of the moulding problem not solved up to the present to which reference was made in the beginning.
  • the slide 18 comprises a part having a generally flatshaped surface 24, provided to form the outer surface 25 of the tongue 9.
  • the surface 24 is parallel to the surfaces 21 and 22 and to the direction of the reciprocating motion of the slide 18 which is the same as for the slide 17.
  • the surfaces 23 and 25 of the tongue are provided with slight roughnesses designed to facilitate the tearing operation of the strip.
  • the presence of these roughnesses permits of holding this tongue more easily between the fingers during this operation.
  • FIG. 6 there is shown the tongue 9 folded flat against the inner surface of the ring 1.
  • This folding operation is effected after moulding, for example by heat softening the base 10 of the tongue and then exerting a radial pressure on the latter.
  • This deformation of the tongue aims simply at avoiding damage thereto during package or transport of the tins.
  • the ring could be fixed to the tin and to the lid not by settings, but by gluing or by soldering; the tin and the lid could not be of cylindrical shape; they could also be of another material than metal, for example of plastic material.
  • vA strip as claimed in claim 1 further comprising a junction line between the base of the tongue and the portion of the strip having a thickness diminishing progressively up to the .base of said tongue, said junction line being oblique relative to the parallel edges of said strip to facilitate the beginning of the tearing.
  • a strip a strip, two peripheral and parallel tearing grooves defining the width of said strip, a tongue integral with said strip and serving to tear said strip along said grooves, said strip having a thickness diminishing progressively up to the base of said tongue to facilitate the initial stage of tearing, the outer surface of said strip in the portion of diminishing thickness being tangential to a cylinder coaxial to said ring, and a junction line between the base of the tongue and the portion of the strip having a thickness diminishing progressively up to the base of said tongue, said junction line having the shape of a chevron, the center point of said chevron beingin the middle of said strip at the end of the portion of diminishing thickness of said strip.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US72233A 1959-12-02 1960-11-28 Unbreakable and impervious ring of moulded synthetic material for package tins Expired - Lifetime US3019936A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3019936X 1959-12-02

Publications (1)

Publication Number Publication Date
US3019936A true US3019936A (en) 1962-02-06

Family

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Family Applications (1)

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US72233A Expired - Lifetime US3019936A (en) 1959-12-02 1960-11-28 Unbreakable and impervious ring of moulded synthetic material for package tins

Country Status (2)

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US (1) US3019936A (fr)
CH (1) CH358711A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343747A (en) * 1965-02-12 1967-09-26 Molins Machine Co Ltd Packets
US4801032A (en) * 1987-08-24 1989-01-31 Northern Engineering & Plastics Corp. Closure for containers with convenient tear off skirt
USD327016S (en) 1989-08-11 1992-06-16 S. Kisling & Cie Ag Bottle cap
USD609091S1 (en) * 2008-07-21 2010-02-02 Kisling Ag Closing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US424982A (en) * 1890-04-08 Sheet-metal can
US2433683A (en) * 1944-11-20 1947-12-30 Continental Can Co Reclosable container with ripping opener
US2747345A (en) * 1949-10-03 1956-05-29 James J Plastino Method of sealing cans

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US424982A (en) * 1890-04-08 Sheet-metal can
US2433683A (en) * 1944-11-20 1947-12-30 Continental Can Co Reclosable container with ripping opener
US2747345A (en) * 1949-10-03 1956-05-29 James J Plastino Method of sealing cans

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343747A (en) * 1965-02-12 1967-09-26 Molins Machine Co Ltd Packets
US4801032A (en) * 1987-08-24 1989-01-31 Northern Engineering & Plastics Corp. Closure for containers with convenient tear off skirt
USD327016S (en) 1989-08-11 1992-06-16 S. Kisling & Cie Ag Bottle cap
USD609091S1 (en) * 2008-07-21 2010-02-02 Kisling Ag Closing device

Also Published As

Publication number Publication date
CH358711A (fr) 1961-11-30

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