Lifting device for a working station of a packaging machine

Details Lifting device for a working station of a packaging machine Lifting device for a working station of a packaging machine

1998-07-30

1999-12-28

Coan, James F.

Package making

Apparatus for forming or partially forming receptacle and...

Forming a pocket, depression, or hollow compartment by...

53 75, 533748, 533756, B65B 3102, B65B 6502

Patent

active

060065052

ABSTRACT:
The invention provides a lifting device for a working station of a packaging machine, the working station comprising a first tool member and a second tool member mounted for movement relative to the first tool member. The lifting device comprises a first lifting member for producing a first closing travel of the second tool member towards the first tool member and a second lifting member for producing a second closing travel following said first closing travel. The second lifting member comprises drive means and mechanical transmission means having means for producing substantially constant closing force for the second closing travel upon occurrence of a resistance. The mechanical transmission means preferably comprises rollers mounted between three planes, whereby the lifting movement for the second closing travel is produced by moving the first plane from a first position into a second position by means of the drive means, thereby displacing the rollers between the second and the third plane such that the distance between the second and third plane is enlarged.

REFERENCES:
patent: 3958394 (1976-05-01), Mahaffy et al.
patent: 4033092 (1977-07-01), Vetter
patent: 5540802 (1996-07-01), Totani
patent: 5551206 (1996-09-01), Fukuda
patent: 5653085 (1997-08-01), Suga

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