Presses – Binding – With material depositing or discharging
Patent
1981-04-15
1983-09-27
Wilhite, Billy J.
Presses
Binding
With material depositing or discharging
53588, 100 26, B65B 1304
Patent
active
044062192
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a parcel tying-up machine, which is to be placed between an input conveyor belt for the parcels to be tied up and an output conveyor belt for the tied-up parcels, with a frame and with a tying-up unit, which has a guide apparatus for placing the tie round a parcel, and a tie-joiner, which is placed under the conveyor path in the tying-up plane and is designed for joining together the loop ends of the tie.
Tying-up machines on these lines are known and are used more specially for tying up parcels of newspapers or periodicals, although they may be used for other parcels, tied up with synthetic a resin tape, cord or wire. If synthetic resin tape is used for tying up, the tie-joiner will be a welder, with whose help the ends of the loop placed round the parcel are welded together. On the other hand, if a cord is used for tying up, the tie-joiner will be a knotter for knotting together the ends of the loop placed round the parcel. If a wire is used for tying up, the tie-joiner may be a twisting unit with which the ends of the wire loop, threaded round the parcel, are twisted up together. If, on the other hand, a steel strap or band is used for tying up, the tie-joiner wil be a swaging unit with which the ends of the steel strap loop, placed round the parcel, are joined together by plastically bending them and possibly using a sheet metal sleeve.
In the case of parcel tying-up machines to date, the parcels, which are moved to the machine by a conveyor belt, have to be stopped, put into the tying-up position and after tying-up have to be pushed on to an output conveyor belt. Because of the braking of the parcels, tying them up and then starting them moving again, the transport of the parcels from one part of the apparatus to another is slowed down to a large degree, that is to say the conveyor belt may only be worked at a given rate of so many parcels in each unit of time as dependent on the rate at which the parcels may be tied up by the typing-up machine. For this reason, the spacing between the parcels on the input conveyor belt has to be generally large in size.
SUMMARY OF THE INVENTION
One purpose of the present invention is that of designing a parcel tying-up machine in the case of which it is not necessary for the parcels to be stopped for tying them up.
This purpose is effected in the invention in that the tying-up unit is supported so that it may be moved backwards and forwards in the frame in the direction of transport of the parcels and may be powered by a driving system, which is fixed to the frame and takes effect in two directions of motion and in that on the two sides of the tying-up plane on the tying-up unit at the level of the conveyor belt, conveying systems are present for taking over the parcels to be tied up from the input conveyor belt and for handing over the parcel after being tied up onto the output conveyor belt after motion of the typing-up unit in the direction of transport.
In the case of this tying-up machine, the parcels may be moved up to the tying-up machine with hardly any spacing between them or right up against each other. As soon as a parcel is in the tying-up position, the tying-up unit is moved generally with the same speed as the input conveyor belt in the direction of transport and, at the same time, the tying-up operation takes place. At the end of the motion of the tying-up unit, the tied-up parcel is handed over to the output conveyor belt and the tying-up unit is moved back to the input conveyor belt so that the next parcel may be taken up by it and tied up.
The tying-up unit with the guide apparatus, the tie-joiner and the conveying systems are placed on a carriage-like frame, which is able to be moved on a straight guide, positioned in said frame. The conveying systems on the moving tying-up unit may be rollers having free-wheels stopping them turning backwards. These rollers may be able to be turned freely so that the parcels are pushed from the input conveyor belt onto to the freely turning rollers of
REFERENCES:
patent: 2339395 (1944-01-01), Harvey
patent: 3577909 (1971-05-01), Takano
Striker Michael J.
Wilhite Billy J.
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