Bags with marks and methods of making same

Abstract

A method of manufacturing a roll of bags includes: moving a layflat tubing from a feed end toward a produce end of a workstation; sealing the layflat tubing to form sealing lines along a width direction of the layflat tubing; punching the layflat tubing to form punching lines along the width direction; spraying, by a coding machine coupled to the workstation, at least one counting mark on the layflat tubing; cutting by the workstation, the layflat tubing along the width direction to form connected bags; and winding the connected bags into the roll of bags. The connected bags are separated by the punching lines, each bag has one of the sealing lines, and at least one bag has the at least one sprayed counting mark that counts its relative position in the roll of bags.

What is claimed is: 
     
         1 . A method of manufacturing a roll of bags, comprising:
 moving a layflat tubing from a feed end of a workstation toward a produce end of the workstation by a moving mechanism of the workstation, wherein the layflat tubing has a length direction and a width direction;   sealing the layflat tubing by a sealing mechanism of the workstation, so as to form a plurality of sealing lines each along the width direction;   punching the layflat tubing by a punching mechanism of the workstation, so as to form a plurality of punching lines each along the width direction;   spraying, by a coding machine coupled to the workstation, at least one counting mark at desired positions on the layflat tubing, wherein each counting mark is located between two adjacent punching lines on the layflat tubing;   cutting, by a cutting mechanism of the workstation, the layflat tubing along the width direction to form a plurality of connected bags; and   winding the connected bags into the roll of bags,   wherein the connected bags in the roll of bags are separated by the punching lines, each of the connected bags comprises one of the sealing lines, and at least one bag of the roll of bags has one of the at least one sprayed counting mark that counts its relative position of the at least one bag in the roll of bags.   
     
     
         2 . The method of  claim 1 , further comprising coordinating operations of the workstation and the coding machine by a controller. 
     
     
         3 . The method of  claim 1 , wherein a number of the connected bags is about 5-50. 
     
     
         4 . The method of  claim 3 , wherein each of the very last 3-5 bags in the roll of bags has a sprayed counting mark that counts how many bags remain in the roll of bags, or each of the roll of bags has a sprayed counting mark that consecutively counts each bag so that a user knows how many bags remain in the roll of bags. 
     
     
         5 . The method of  claim 1 , wherein the at least one counting mark comprises a plurality of counting marks that are different from each other, and each of the counting marks is printed on one of the connected bags located at an inner side of the roll of bags. 
     
     
         6 . The method of  claim 1 , wherein the at least one counting mark comprises at least one number, at least one warning message, at least one color paint, and/or a combination thereof 
     
     
         7 . The method of  claim 1 , further comprising heating the punching mechanism to a predetermined temperature. 
     
     
         8 . The method of  claim 1 , further comprising configuring a length of each of the connected bags by an adjusting mechanism of the workstation. 
     
     
         9 . The method of  claim 1 , further comprising entering parameters through an interface of the workstation. 
     
     
         10 . The method of  claim 1 , further comprising positioning a nozzle of the coding gun relative to the workstation. 
     
     
         11 . The method of  claim 1 , wherein the coding machine comprises an interface for configuring parameters of the at least one counting mark, and the parameters comprises content of the at least one counting mark, font of the at least one counting mark, direction of the at least one counting mark, and distance between components of the at least one counting mark. 
     
     
         12 . A roll of bags, comprising a plurality of bags that are separated by punching lines, each of the bags is sealed with a sealing line, wherein at least one bag of the roll of bags has a counting mark that counts its relative position of the at least one bag in the roll of bags. 
     
     
         13 . The roll of bags of  claim 12 , wherein each of the very last 3-5 bags in the roll of bags has a counting mark that counts how many bags remain in the roll of bags, or each of the roll of bags has a counting mark that consecutively counts each bag so that a user knows how many bags remain in the roll of bags. 
     
     
         14 . The roll of bags of  claim 12 , wherein the roll of bags is made by a workstation from a layflat tubing, and the counting mark is sprayed on the at least one bag by a coding machine. 
     
     
         15 . A system for manufacturing a roll of bags, comprising:
 a workstation having a feed end and a produce end, the workstation comprising:
 a moving mechanism configured to move a layflat tubing from the feed end toward the produce end, wherein the layflat tubing comprises a length direction and a width direction; 
 a sealing mechanism configured to seal the layflat tubing to form a plurality of sealing lines, each of the sealing lines along the width direction; 
 a punching mechanism configured to punch the layflat tubing to form a plurality of punching lines, each of the punching lines along the width direction; 
 a cutting mechanism configured to cut the layflat tubing along the width direction to form a plurality of connected bags; and 
 a winding mechanism configured to wind the connected bags into the roll of bags; and 
   a coding machine coupled to the workstation, and configured to spraying at least one counting mark on the layflat tubing,   wherein the connected bags in the roll of bags are separated by the punching lines, each of the connected bags comprises one of the sealing lines, and at least one bag of the roll of bags has one of the at least one sprayed counting mark that counts its relative position of the at least one bag in the roll of bags.   
     
     
         16 . The system of  claim 15 , wherein the at least one counting mark comprises a plurality of counting marks that are different from each other, and each of the counting marks is printed on one of the connected bags located at an inner side of the roll of bags. 
     
     
         17 . The system of  claim 15 , wherein the at least one counting mark comprises a number, a warning message, a color paint, and a combination thereof. 
     
     
         18 . The system of  claim 15 , further comprising a controller configured to coordinate operations of the workstation and the coding machine. 
     
     
         19 . The system of  claim 19 , further comprising a layflat tubing making machine configured to make the layflat tubing, and the workstation, the coding machine and the layflat tubing making machine are controlled by the controller to automatically making the roll of bags from plastic material fed to the layflat tubing machine. 
     
     
         20 . A non-transitory computer-readable medium storing instructions which, when executed by one or more processors, cause a system to manufacture a roll of bags according to the method of  claim 1 .