Coating apparatus – Projection or spray type – Work-supported and guided carriage
Patent
1999-03-19
2000-12-26
Beck, Shrive
Coating apparatus
Projection or spray type
Work-supported and guided carriage
118323, 118324, 118500, 413 58, 413 61, B05B 1302
Patent
active
061652660
DESCRIPTION:
BRIEF SUMMARY
OBJECT OF THE MENTION
The invention proposed consists of a revarnishing machine for easy opening lids, characterised by having a single or double revolving revarnishing head and a lid transporting device.
The machine is provided with a single or double rotating motorised revarnishing head which applies varnish to the lids with a circular motion, with a conical varnish projection of adjustable height, by a revarnishing gun either with or without an additional separator of a thickness adjustable depending on the diameter of the lid to be varnished.
The lid transporting device in the baseplate of the revarnisher is complemented by a drive chain at the base of the lid feeder which has an engine connected to a intermittent wheel race which provides four starts and four stops in each turn of the engine outlet shaft, the lids being varnished one at a time during the stops.
Also object of the invention is a can feeder located in relation to the storage tower where the cans are gathered.
BACKGROUND OF THE INVENTION
Lid revarnishing machines are well known and widely used, the applicant having several patents related to devices incorporated to this type of machines.
After continuous use, this type of revarnishing machines present the problem of an uneven distribution of the width of the varnish band, producing surface finishes which may generate rejections and in any case force the manufacturer to control production frequently.
Different solutions have been attempted, without obtaining industrially viable results so far, particularly for the conical varnish projection and with diameter agreeing with the size of the incision, due to the uneven distribution of the varnish.
The applicant is not aware of revarnishers for easy opening lids which are provided with two sided, single or double revarnishing heads as well as conveyors of the type described in the present application.
DESCRIPTION OF THE INVENTION
The invention object of the present invention relates to a revarnishing machine for easy opening lids with a revolving revarnishing head, single or double, and a lid transporting device.
The head basically consists of a rotary slip driven by an above toothed pulley provided with a belt which connects with their pulleys, one of which is coupled to an electric drive motor from which the rotation is transmitted to the slip by said belt, and by a shaft fitted inside said slip; having a pneumatic revarnishing gun, with or without an additional separator which can be laterally adapted to the shaft, of a variable thickness depending on the size of the lid to be varnished, and conical bearings which absorb the axial and radial loads of the rotating head.
The slip will revolve with the shaft, turning the gun included in a recess of the slip.
As the gun turns it undergoes a circular motion which applies the varnish to the lid as a cone of adjustable height.
A three step revolving joint coupled above the head, related to the head, incorporates the varnish and air inlets of the pneumatic gun.
In addition, the revarnisher is provided with a lid transportation device with an electric motor, connected by toothed pulleys and a belt to an intermittent wheel race, starting and stopping, provided with two shafts, one at the inlet and one at the outlet, the first shaft revolving continuously, together with the motor, and the latter turning intermittently by a cam-follower mechanism which causes starts and stops to varnish the lids one at a time during the stops.
A set of gears and a link chain also transmit the movement of the motor to a lid feeder.
The lid feeder is located with relation to the lid storage tower, to place the lids on the transportation device.
The lid feeder, through a pair of helical gears placed on two perpendicular shafts, drives the shaft of a lid positioner and a discoidal dosing blade located above the positioner.
The dosing blade has peripheral flaps to receive the outer edge of the lid and inclined peripheral flaps which make the lid descend after the blade turns, directing the lids towards the lid positi
REFERENCES:
patent: 3094254 (1963-06-01), Cullen et al.
patent: 4498415 (1985-02-01), Tsuchiya et al.
patent: 4605351 (1986-08-01), Hatcher et al.
patent: 4768498 (1988-09-01), Herrick
patent: 5895528 (1999-04-01), Gomariz Perez
Beck Shrive
Calcagni Jennifer
Schwartz Robert M.
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