Arrangement for forming a band loop and method and device for manufacturing peel-off lids

Abstract

When handling a foil band ( 6 ) which is to be uncoiled from a delivery spool ( 2 ) and is drawn in gradually by a drawing-in device ( 4 ), a foil band loop ( 7 ) is produced. In order that this can take place without any errors with high production cadences, provision is made of an arrangement ( 1 ) in which a hollow cylinder ( 10 ) rests loosely on the band with a limited freedom of movement so as to form the band loop. Such an arrangement is preferably provided for the production of peel-off lids, in which a foil band is uncoiled from a band delivery spool and fed to a stamping and sealing station.

1 . Arrangement ( 1 ) provided and adapted to form a band loop ( 7 ) between a band delivery spool ( 2 ) which is actuated for uncoiling and an actuated drawing-in device ( 4 ) for a stepwise drawing-in of a band ( 6 ), characterized in that the arrangement has two side walls ( 8 ,  9 ) between which the band runs, and a hollow cylinder ( 10 ) which is guided on each of its end faces through a respective side wall of the arrangement and is loosely movable to a predetermined extent between the side walls, wherein the hollow cylinder is intended to come to lie on the band ( 6 ) during operation of the arrangement and to deflect the band as a loop ( 7 ). 
     
     
         2 . Arrangement according to  claim 1 , characterized in that a horizontal running transversal bar ( 11 ) which is supported on both sides in the side walls runs through the hollow cylinder, which limits the free mobility of the hollow cylinder. 
     
     
         3 . Arrangement according to  claim 2 , characterized in that the transversal bar ( 11 ) is arranged in a vertically slidable way in vertical groove guidances ( 12 ,  12 ′) in the side walls ( 8 ,  9 ). 
     
     
         4 . Arrangement according to  claim 1 , characterized in that a drawing-in-sided and an exit-sided band deflector ( 14 ,  15 ) are provided above the side walls. 
     
     
         5 . Arrangement according to  claim 1 , characterized in that a band deflector ( 16 ) is provided on the drawing-in side in front of the side walls and on the exit side above the side walls. 
     
     
         6 . Arrangement according to  claim 4  characterized in that lateral limiters ( 14 ′,  14 ″,  15 ′,  15 ″) which are adjustable to the width of the band at the deflectors are provided for the band. 
     
     
         7 . Arrangement according to  claim 1 , characterized in that it has attachment means ( 17 ,  18 ) for an attachment to the support ( 3 ,  5 ) of the band delivery spool, by means of which the distance of the arrangement ( 1 ) to the band delivery spool ( 2 ) is adjustable in band transport direction. 
     
     
         8 . Arrangement according to  claim 1 , characterized in that it comprises a contactless sensor ( 19 ′) for determining the position of the band loop, particularly a distance sensor for determining the vertical distance of the band loop from the sensor. 
     
     
         9 . Method for manufacturing peel-off lids by using an arrangement adapted to form a band loop ( 7 ) between a band delivery spool ( 2 ) which is actuated for uncoiling and an actuated drawing-in device ( 4 ) for a stepwise drawing-in of a band ( 6 ), wherein the arrangement has two side walls ( 8 ,  9 ) between which the band runs, and a hollow cylinder ( 10 ) which is guided on each of its end faces through a respective side wall of the arrangement and is loosely movable to a predetermined extent between the side walls, and wherein the hollow cylinder is intended to come to lie on the band ( 6 ) during operation of the arrangement and to deflect the band as a loop ( 7 ), comprising the steps of
 forming a row or a plurality of parallel rows of lid rings made of metal, wherein a stepwise linear transport of the lid parts to a plurality of processing stations is carried out,   stepwise delivering a foil band from a band delivery spool to the lid rings and stamping out of foil sections as well as applying and heat sealing the foil sections onto the lid rings in a stamping and sealing processing station, wherein a band loop, which comes to lie between the band delivery spool and the drawing-in device of the foil band in the stamping and sealing processing station, is formed in the foil band by the arrangement.   
     
     
         10 . Method according to  claim 9 , characterized in that
 the foil band is supplied to the stamping and sealing processing station with partially unequal step lengths and, as seen horizontally and from the top, with its longitudinal direction substantially perpendicular to the transport direction of the lid parts.   
     
     
         11 . Method according to  claim 9 , characterized in that the stepwise linear transport of the lid parts is carried out on a transport device with toothed belts and tappets. 
     
     
         12 . Device for manufacturing peel-off lids with an arrangement adapted to form a band loop ( 7 ) between a band delivery spool ( 2 ) which is actuated for uncoiling and an actuated drawing-in device ( 4 ) for a stepwise drawing-in of a band ( 6 ), wherein the arrangement has two side walls ( 8 ,  9 ) between which the band runs, and a hollow cylinder ( 10 ) which is guided on each of its end faces through a respective side wall of the arrangement and is loosely movable to a predetermined extent between the side walls, and wherein the hollow cylinder is intended to come to lie on the band ( 6 ) during operation of the arrangement and to deflect the band as a loop ( 7 ), comprising a transport device provided for a stepwise, linear transport of lid parts to a plurality of subsequent processing stations, under which a stamping and sealing processing station is provided, which is adapted to stamp out foil sections as well as to apply and heat seal the foil sections onto the lid rings, and a foil band delivery which is provided for stepwise delivering a foil band from a band delivery spool to the stamping and sealing processing station, wherein a foil band loop is generated by the arrangement, which comes to lie between the band delivery spool and the drawing-in device of the foil web in the stamping and sealing processing station. 
     
     
         13 . Device according to  claim 12 , characterized in that the foil band delivery is arranged in such a way that the foil band is supplied to the stamping and sealing processing station, as seen horizontally and from the top, with its longitudinal direction substantially perpendicular to the transport direction of the lid parts. 
     
     
         14 . Device according to  claim 12 , characterized in that a transport device with lid part trays formed by toothed belts and tappets is provided for the stepwise linear transport of the lid parts. 
     
     
         15 . Arrangement according to  claim 2 , characterized in that a drawing-in-sided and an exit-sided band deflector ( 14 ,  15 ) are provided above the side walls. 
     
     
         16 . Arrangement according to  claim 2 , characterized in that a band deflector ( 16 ) is provided on the drawing-in side in front of the side walls and on the exit side above the side walls. 
     
     
         17 . Arrangement according to  claim 2 , characterized in that it has attachment means ( 17 ,  18 ) for an attachment to the support ( 3 ,  5 ) of the band delivery spool, by means of which the distance of the arrangement ( 1 ) to the band delivery spool ( 2 ) is adjustable in band transport direction. 
     
     
         18 . Method according to  claim 10 , characterized in that the stepwise linear transport of the lid parts is carried out on a transport device with toothed belts and tappets. 
     
     
         19 . Device according to  claim 13 , characterized in that a transport device with lid part trays formed by toothed belts and tappets is provided for the stepwise linear transport of the lid parts.