Method for making an aerosol housing with threaded neck
AssigneeCebal
InventorsFranck Flecheux, Jacques Granger, Bernard Schneider
Life of this patent
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Abstract
Process for manufacturing a metal can with a threaded neck on which a removable head can be fitted, includes the steps of forming a can with a closed bottom end, a cylindrical wall and an open top end, forming a neck at the open top end, obtaining a ring with a spindle hole of known diameter and a threaded external surface, sleeve fitting the ring by driving the spindle hole over the neck, and plastically expanding the neck by an amount sufficient that its outer diameter exceeds the diameter of the spindle hole when unstressed.
Claims8
Process for manufacturing a metal can with a threaded neck on which a removable head can be fitted, comprising the steps of:
- forming a can with a closed bottom end, a cylindrical wall and an open top end;
- forming a neck having an outer surface at the open top end;
- obtaining a ring with an inner surface defining a spindle hole of known diameter and a threaded external surface, and sleeve fitting the ring by driving the spindle hole over the neck;
- and
- plastically expanding the neck by an amount sufficient that its outer diameter exceeds the diameter of the spindle hole when unstressed, and causing thereby mating of the outer surface of the neck with the inner surface of the ring,
- the ring being made of a material sufficiently resilient that its spring back effect after said expanding is greater than spring back effect of the neck,
- wherein the mating surfaces of the neck and the ring have a substantially constant diameter within any transverse plane therehrough.
Receptacle comprising a metal can having a neck having an outer surface adapted to be secured to a removable head,
- the receptacle further comprising a ring having an inner surface defining a spindle hole with an inner diameter disposed around the neck and having a securing means for the removable head on its outer surface, the ring being bonded to the metal can by expansion of the neck by an amount sufficient that its outer diameter is greater than the inner diameter of the ring in an unstressed state and causing thereby mating of the outer surface of the neck with the inner surface of the ring, to result in a bond of sufficient strength to resist separation torque from the removable head,
- the ring being made of a material sufficiently resilient that its spring back effect after expansion is greater than spring back effect of the neck,
- wherein the mating surfaces of the neck and the ring have a substantially constant diameter within any transverse plane therethrough.
Dependencies are inferred from the claim text.