Metal deforming – By use of tool acting during relative rotation between tool... – Tool orbiting or rotating about an axis
Patent
1985-04-16
1986-10-28
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
Tool orbiting or rotating about an axis
72126, 29441BP, B21D 4104
Patent
active
046191305
ABSTRACT:
The apparatus allows providing a rim on the tips for ballpoint pens even if made of a very hard material, such as stainless steel, as it can withstand very great pressure. It comprises a first body (1) rotating about an axis (8) which coincides with the axis of the tip (10) to be provided with a rim. The body (1) is provided with an eccentric hole (11) on whose axis (9) a second body (3) rotates on first rolling bearings, in which second body (3) a pivot (5) rotates coaxially on second rolling bearings. The pivot (5) contacts on its inner end (5") a pushing member (12) and on its external end a first convergent conical surface (5') which presses directly on the edge (6) of the tip to be provided with a rim with the aid of a second divergent conical surface (3' ) joined to the second body (3). The two surfaces (3'and 5') are such as to constitute the angle .alpha. which is most suitable for providing a rim on the edge (6) of the tip (10) by retaining the ball with the desired clearance.
REFERENCES:
patent: 2992572 (1961-07-01), Lockart
patent: 3009240 (1961-11-01), Brown
patent: 3273368 (1966-09-01), Sporck
Buzzi & Co. S.A.
Larson Lowell A.
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