Package making – Partial cover application – Band or tube
Patent
1996-04-25
1997-11-25
Johnson, Linda
Package making
Partial cover application
Band or tube
53582, 100 33PB, B65B 6708
Patent
active
056899432
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for tensioning and closing hooping bands, and more particularly to an apparatus for tensioning packing straps and securing the ends together which is made of plastic and is preferably designed, for hooping packages. The apparatus for tensioning and closing hoop bands preferably includes a tensioning wheel that can be turned by means of a tensioning lever, which wheel co-operates with a pressure plate for tensioning the ends of the band, and a closing device by which the two band ends can be pressed on top of one another and joined together, as well as an opening device which on being actuated lifts the closing device off the band ends and releases the pressure plate from its interaction with the tensioning wheel.
BACKGROUND OF THE INVENTION
Such apparatuses, by means of which, for example, plastic bands placed around packages can be tensioned and closed with the closing device, generally have a drive motor which receives power from a rechargeable battery or a replaceable battery. The tensioning of the hooping band takes places with the aid of the swivel lever, so that the motor is required only to operate the closing device and, therefore, uses only little current.
The swivel lever is normally arranged on the tensioning wheel axle by means of a ratchet mechanism, so that during the swivelling in one direction it turns the tensioning wheel and in this way tensions the two band ends in relation to one another. During the swivelling back of the swivel lever in the opposite direction, the tensioning wheel axle is locked and the swivel lever can swivel freely on same.
To be able to place the band ends in the apparatus prior to the tensioning or so that after the closing the apparatus can again be removed from the finished hooping, it is necessary that the pressure plate co-operating with the tensioning wheel is lifted off the latter and to also raise the closing device to such an extent that a passage is freed for the band ends. To this end the known devices have an additional venting lever, which must be actuated before the band ends are put in and after the closing has taken place, so as to put the band ends in the apparatus and to be able to take them out of same again.
Such an additional venting lever makes the apparatus unwieldy and may interfere with the actuating of the swivel lever for tensioning the band ends. It is possible that inexperienced users of the apparatus confuse the two levers. In that case it may happen that due to an unintentional actuating of the venting lever already tensioned hooping bands suddenly lose their pre-stress again and shoot out of the device, and in doing so injure the user of the apparatus.
SUMMARY OF THE INVENTION
It is the object of the invention to avoid these disadvantages and to create an apparatus for tensioning and closing hooping bands, which is easy to handle and can be operated easily and safely.
This object is achieved by the invention in that between the swivel lever and the opening device an actuating element is provided, which during the swivelling of the swivel lever in a specific area engages with an actuating area for actuating the opening device.
This construction has the advantage that an additional venting lever can be dispensed with, as the swivel lever serves to tension the hooping bands as well as to lift off the pressure plate and the closing device after the closing has taken place or before the band ends are put in.
The apparatus, therefore, has only one lever for tensioning the band ends as well as for actuating the opening device, and as a result thereof is very easy to manage and particularly easy and safe to operate. The user of the apparatus, to carry out the tensioning and opening, need not change from one lever to the other, so that operating mistakes due to him confusing the levers are excluded. It is particularly expedient when the actuating element is a stop pin arranged on the swivel lever and the actuating area is provided on a lever element coupled to the opening device. Such a construction
REFERENCES:
patent: 4313779 (1982-02-01), Nix
patent: 4820363 (1989-04-01), Fischer
patent: 5058365 (1991-10-01), Kagi
Cyklop GmbH
Johnson Linda
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