(19)
(11) EP 0 244 065 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.12.1988 Bulletin 1988/52

(43) Date of publication A2:
04.11.1987 Bulletin 1987/45

(21) Application number: 87301965

(22) Date of filing: 06.03.1987
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI NL SE

(30) Priority: 30.04.1986 GB 8610570

(71) Applicant: W.R. GRACE & CO.
 ()

(72) Inventor:
  • Ryder, Geoffrey Alan
     ()

   


(54) Threaded container and closure therefor


(57) A threaded container has non-overlapping thread portions 4a and 4b of a multi-start thread such that at the parting line 7 of the external mould parts for the moulded container l there is a zone in which the generatrices of the container rim do not intersect any of the thread portions of the multi-start container external thread. This facilitates parting of the external mould parts of the container.
Preferably the container rim is closed by a closure having an internal multi-start thread comprising thread portions which are overlapping such that in every position of the generatrix of the closure skirt the generatrix intersects a thread portion of the skirt.







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