Flexible sealing strip

Abstract

A flexible sealing strip applied to a long soft opening of an airtight or watertight bag is revealed. The flexible sealing strip includes a long cut portion, a first plate portion and a second plate portion formed integrally on two sides of the long cut portion in a length direction respectively, and a fastening portion arranged at two ends thereof. The long soft opening is opened when the first and the second plate portions are bent flexibly and away from each other relative to the long cut portion. The long soft opening is closed when the first and the second plate portions are turned back to the original state, parallel to each other in the length direction. Next the flexible sealing strip is rotated 360 degrees relative to the long soft opening and bent so that the fastening portion is secured. Therefore the bag is sealed firmly.

What is claimed is: 
     
         1 . A flexible sealing strip having a certain length and applied to an opening of an airtight or watertight bag comprising:
 a long cut portion that is arranged at a middle part of the flexible sealing strip in a length direction thereof and having a length smaller than a length of the flexible sealing strip, and a chamfer disposed on each of two ends in the length direction thereof;   a first plate portion that is located on one of two sides of the long cut portion, along the length direction of the long cut portion and connected to a first edge of the long soft opening of the bag;   a second plate portion that is located on the other side of the long cut portion, opposite to the side with the first plate portion, attached to a second edge of the long soft opening of the bag, and integrally formed with the first plate portion; and   a fastening portion having a first fastener and a second fastener secured to each other and arranged at two ends in the length direction of the flexible sealing strip respectively;   wherein the first edge of the long soft opening is moved toward one direction along with the first plate portion and the second edge of the long soft opening is moved to the opposite direction along with the second plate portion when the first plate portion and the second plate portion are bent flexibly and away from each other with respect to the long cut portion; thus the long soft opening of the bag is in an opened state;   wherein the first edge and the second edge of the long soft opening are moved along with the first plate portion and the second plate portion respectively to be parallel to each other in the length direction when the first plate portion and the second plate portion are flexibly turned back to the original state relative to the long cut portion; thus the long soft opening of the bag is closed in the length direction;   wherein the flexible sealing strip is rotated after the flexible sealing strip being turned back to the length direction horizontally so that the first edge and the second edge of the long soft opening of the bag are also rotated toward the bag at least 360 degrees along with the flexible sealing strip; then the flexible sealing strip is bent flexibly so as to make the first fastener and the second fastener of the fastening portion secure to each other; thereby the long soft opening of the bag is closed.   
     
     
         2 . The device as claimed in  claim 1 , wherein the fastening portion is integrally formed at two ends of the flexible sealing strip. 
     
     
         3 . The device as claimed in  claim 2 , wherein the first fastener is arrow-shaped and having a head part and a neck part while the second fastener is a T-shaped slot including a straight slot in the length direction and a transverse slot communicating with the straight slot; wherein the head of the first fastener is passed through the T-shaped slot from one side of the second fastener to the other side of the second fastener so that the head is stopped and locked on the other side of the second fastener and the fastening portion is in a fastened state. 
     
     
         4 . The device as claimed in  claim 1 , wherein the fastening portion is fixed at two ends of the flexible sealing strip by the first fastener and the second fastener; either the first fastener or the second fastener is selected from the group consisting of a quick release buckle, a Velcro Hook Loop and a button respectively. 
     
     
         5 . The device as claimed in  claim 1 , wherein the first plate portion and the second plate portion of the flexible sealing strip are connected to the first edge and the second edge of the long soft opening of the bag respectively by a means selected from the group consisting of glue, heat fusion, high frequency melting, and sewing. 
     
     
         6 . The device as claimed in  claim 1 , wherein the bag is made from at least one material selected from the group consisting of thermoplastic polyurethane (TPU), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and nylon or their combinations. 
     
     
         7 . The device as claimed in  claim 1 , wherein the bag is an inflatable mattress. 
     
     
         8 . The device as claimed in  claim 1 , wherein the bag is a waterproof bag. 
     
     
         9 . The device as claimed in  claim 7 , wherein the long soft opening is further disposed with an air valve when the bag is an inflatable mattress; the air valve is formed by a first fabric layer and a second fabric layer connected to each other; one end of the first fabric layer and one end of the second fabric layer close to the long soft opening are connected to the first edge and the second edge respectively. 
     
     
         10 . The device as claimed in  claim 1 , wherein the chamfer is a fillet. 
     
     
         11 . The device as claimed in  claim 1 , wherein the chamfer is a bevel.