Tearing structure of tear strip, manufacturing device and manufacturing method of tearing structure

Abstract

The present invention discloses a tearing structure of a tear strip and its manufacturing device and manufacturing method. During the process of manufacturing the bag, the bow defined by the pull-up portion is relatively flat. It does not upwarp or interfere with other devices, causing equipment damage or bag waste. The junctions of the pull-up portion are formed by the unevenness of the cutter, which can be used as anti-counterfeiting and anti-theft function. It is judged whether the pull-up portion is opened by the connection of the dotted line of the bow. The inverted buckled structure is formed at a bottom of the bag body and the organ surface is not opened, which is more favorable for sucker grabbing. The second cutter has a square serrated incision to avoid the entire cut-through, thereby solving the problem that the fall off between the pull-up portion and the tear strip caused by overcut in the past.

1 . A tearing structure of a tear strip, wherein:
 the tear strip, which is installed within an upper film of a bag body, comprises a guide strip, an installation part and the tearing structure;   the tearing structure comprises a pull-up portion and a connection portion, wherein: the pull-up portion is formed by longitudinally cutting through a cutting apparatus, the pull-up portion has an edge, there are multiple junctions on the edge are not cut, so that when a force is applied to pull up the pull-up portion, the connection portion is longitudinally cut through the cutting apparatus to remain the upper film of the bag body and the guide strip.   
     
     
         2 . The tearing structure of the tear strip, as recited in  claim 1 , wherein: the edge is butterfly-shaped or C-shaped. 
     
     
         3 . The tearing structure of the tear strip, as recited in  claim 1 , wherein: there are  2  to  4  junctions on the edge. 
     
     
         4 . A device for manufacturing the tearing structure of the tear strip as recited  claim 1 , which comprises a cutting apparatus, wherein: the cutting apparatus comprises an upper cutting part and a lower cutting part; a first cutter is located at a lower end of the upper cutting part and is fitted with the edge of the pull-up portion in shape; the first cutter comprises a convex portion and a concave portion; the convex portion defines the edge and the concave portion defines the junctions through cutting; a second cutter is located at an upper end of the lower cutting part and is fitted with the connection portion in shape. 
     
     
         5 . The device for manufacturing the tearing structure of the tear strip, as recited in  claim 4 , wherein: a pad is located under the lower cutting part and is made from SiO 2 .nH 2 O. 
     
     
         6 . The device for manufacturing the tearing structure of the tear strip, as recited in  claim 4 , wherein: the second cutter has a square serrated incision to avoid an entire cut-through. 
     
     
         7 . A method for manufacturing a tear strip of an organ bag through the device as recited in  claim 4 , which comprises steps of: installing a guide strip and an installation part of the tear strip within an upper film of a bag body, placing the bag body between an upper cutting part and a lower cutting part of the cutting apparatus, performing cut-through on an edge of a pull-up portion, wherein the upper film, the guide strip, the installation part, an organ side and a lower film are cut through in sequence, forming an inverted buckled structure at a back of the lower film, remaining the upper film and the guide strip at the connection portion, and cutting off the installation part, the organ side and the lower film.