Method and an Apparatus in the Advancement of Packaging Blanks

Abstract

A method of advancing packaging blanks disposed standing upright in a magazine, one after the other, in a file or queue resting against the bottom of the magazine and disposed to be driven forwards through the magazine towards a stop at an outlet end for individual discharge comprises the file or queue of blanks being divided into two pressure zones, a first and forward pressure zone extending from the zone limit between the pressure zones up to the stop and displaying a first mutual pressure between neighboring blanks, as well as a rear second pressure zone displaying a second mutual pressure between neighboring blanks. The first mutual pressure is higher than the second mutual pressure. Another aspect of the disclosure pertains to an apparatus for carrying out advancement of the packaging blanks.

1 . A method for advancement of packaging blanks disposed standing upright in a magazine, one after the other, in a file or queue resting with one edge portion against a bottom of the magazine and disposed to be driven forwards through the magazine towards a stop at an outlet end for individual discharge, wherein the file or queue of blanks is divided into two pressure zones, a first and forward pressure zone extending from a zone limit between the two pressure zones up to the stop and displaying a first mutual pressure between neighbouring blanks, and a rear, second pressure zone displaying a second mutual pressure between neighbouring blanks; and that said first mutual pressure is higher than said second mutual pressure.  
   
   
       2 . The method as claimed in  claim 1 , wherein means displaying an elevated peripheral speed are applied locally against the file or queue of blanks at the zone limit from opposing directions.  
   
   
       3 . The method as claimed in  claim 2 , wherein the peripheral speed of the means in contact with a blank is directed to drive the blank in a direction towards the discharge or outlet end of the magazine and exceeds an advancement speed for the blanks which is required at a relevant discharge speed out of the magazine.  
   
   
       4 . An apparatus for advancement of packaging blanks comprising: a magazine for holding the packaging blanks, one after the other, in a file or queue resting with an edge portion against a bottom of the magazine and disposed to be driven forwards through the magazine towards a stop at an outlet end for individual discharge, friction means disposed in association with the outlet end on either side of the magazine and adapted to contact a number of the blanks disposed in the magazine for frictionally engaging the blanks; and the friction means in each respective contact displaying a peripheral speed in a direction towards the outlet end which exceeds an advancement speed of the blanks which is required at a pertinent discharge speed out of the magazine.  
   
   
       5 . The apparatus as claimed in  claim 4 , wherein the friction means display flexible projections for the contact with the blanks.  
   
   
       6 . The apparatus as claimed in  claim 5 , wherein the flexible projections in the friction means are supported by a rotating centre shaft whose axis of rotation is at right angles disposed in relation to a direction of advancement of the blanks and in relation to the bottom of the magazine.  
   
   
       7 . The apparatus as claimed in  claim 4 , wherein the friction means display bristles for contact with the blanks.  
   
   
       8 . The apparatus as claimed in  claim 7 , wherein the friction means display rotationally formed brushes.  
   
   
       9 . The apparatus as claimed in  claim 5 , wherein the friction means display bristles for contact with the blanks.  
   
   
       10 . The apparatus as claimed in  claim 6 , wherein the friction means display bristles for contact with the blanks.  
   
   
       11 . An apparatus for advancement of packaging blanks comprising: 
 a magazine for holding the packaging blanks, one after the other, in a file or queue, the magazine comprising an outlet end;    a discharge device positioned adjacent the outlet end of the magazine which discharges the packaging blanks from the magazine;    a pair of rotatably mounted shafts positioned on respective sides of the magazine, and a plurality of flexible projections extending outwardly from each of the shafts to frictionally contact edges of a plurality of the packaging blanks and apply a force to the packaging blanks urging the packaging blanks towards the forward end of the magazine;    a pusher for applying a force to a bottom-most one of the packaging blanks of the file or queue of packaging blanks to urge the packaging blanks in a direction towards the rotatably mounted shafts;    the flexible projections of the shafts displaying a peripheral speed in a direction towards the outlet end of the magazine which exceeds an advancement speed of the blanks required at a pertinent discharge speed out of the magazine.