B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 53/02 (2006.01) B29C 53/00 (2006.01) B29C 57/00 (2006.01) B65D 41/34 (2006.01)
Patent
CA 2151861
The invention relates to an improvement to a process for manufacturing a closing device constituted by a tapped closing device and a tamper-proof ring comprising, on the one hand, an annular joining strip with controlled deformation and, on the other hand, an inner annular projection. According to the invention, a preforming of the tamper-proof ring is effected: - by axially introducing in said device a cylindrical mandrel which is provided with an annular peripheral cam such that the lower face of the inner annular projec- tion comes into abutment against said cam, then - by exerting on said device and/or on the mandrel a bearing effort whose force is sufficient to ensure a relative stroke of the mandrel in the device in contact with the cam up to a preforming position maintained for a determined time so as jointly to produce an outward bending of the strip with controlled deformation and a remanent deflection towards the closing device of the inner annular projection so that its upper face remains inclined by an angle with respect to the normal to the axis of the device.
Franchet Alain Gerard
Guerrazzi Vincent
Pellerano Pierre Batiste
Moulage Automatique (le)
Sim & Mcburney
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