Conveyors: power-driven – Conveyor system for moving a specific load as a separate unit – System includes a rotating or endless carrier with a load...
Reexamination Certificate
1999-11-03
2001-08-07
Hess, Douglas (Department: 2167)
Conveyors: power-driven
Conveyor system for moving a specific load as a separate unit
System includes a rotating or endless carrier with a load...
C198S474100, C198S476100
Reexamination Certificate
active
06269936
ABSTRACT:
BACKGROUND OF THE INVENTION
The subject-matter of the invention is an installation for the transport of helical-shaped wound springs, according to the introductory part of patent claim
1
.
With the manufacture of high quality springs for mattresses, a heat treatment is carried out which effects a permanently constant spring constant. The heat treatment may be effected directly after the production, i.e. after the winding of the spring or in a separate working procedure. With modem high performance machines the manufacturing process is carried out as uninterrupted as possible, i.e. the springs after the winding are immediately led to a heat treatment and from here go directly to further processing, e.g. to a fully automatically functioning spring interior assembly machine. With the previously known installations the springs after winding are grasped with drivable, exactly controlled holding means and are led from processing station to processing station. The mechanical and electrical control expense of such holding means is quite large and its maintenance is expensive.
BRIEF SUMMARY OF THE INVENTION
The object of the present invention thus lies in providing an installation which takes over the springs wound on the winding machine, can lead them to a heat treatment station and from here to a transport means and which makes do without actively driven and controlled holding means.
This object is achieved by an installation for the transport of helical-shaped wound springs according to the features of patent claim
1
.
Advantageous formations of the invention are defined in the dependent claims.
It possible with spring loaded jaws arranged in pairs and with a simple insertion device to take over the springs from the winding machine, to introduce them into the heat treatment station and subsequently with a scraper to introduce them from the holding means into the transport device. For the holding means neither mechanical drives nor control means are required. The retention of the springs is effected by the gripping force of the jaws cooperating in pairs. The star turret carrying the holding means can as a result be manufactured extremely inexpensively, since no clamping drive elements need be guided through its rotational axle and through the arms. The drives of the star turret, of the insertion device and of the scraper may be connected synchronously to one another. As a result a complicated control is not necessary.
REFERENCES:
patent: 4968081 (1990-11-01), Beight et al.
patent: 5169139 (1992-12-01), Stauber et al.
patent: 5311976 (1994-05-01), Backman
patent: 5388820 (1995-02-01), Eberle et al.
patent: 5743377 (1998-04-01), Kronseder
Keller Roland
Schnutt Josef
Hess Douglas
Spuhl AG St. Gallen
Wood Herron & Evans LLP
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