US  3,970,501 <br/>
Process for separating a number of sheets into groups. 

 -  Jul. 20, 1976 
<br/><br/> Pat.file 53 
<br/><br/><label>Subjects--Local Terms: </label><br/>ADHESIVES <br/>COPYING PAPER 
<br/><br/><label>Call Number: </label>US 3,970,501