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Gas filling valve for gas tight bags
Patent Name Gas Filling Valve for Airtight Bags Patent Applicant Inc. 牛尾主 Applicant Address Hyogo Prefecture Inventor 牛尾宪 二申请申请 (patent) No. 200410004615.8 Date of Application 2004.02.20 Approval Date Approval No. 1657811 Date of Approval Notice 2005.08 .24 Specification CD-ROM D0534 Main Classification No. F16K15/20 Classification No. F16K15/20 Subscribing Original Application No. PRIORITY STATISTICS Applicable as a buffer or a cargo movement prevention material when packaged and transported with easily damaged or damaged articles. The gas injection valve for the airtight bag on the airtight bag can suppress the occurrence of a gap between the cylindrical walls to improve the airtightness, and can facilitate the gas discharge operation in the airtight bag. It is an air injection valve consisting of a flexible, multi-layer polymer film and is mounted on a part of the airtight bag. One end is located outside the airtight bag and the other end is inside the airtight bag. In addition, the multilayer portion S1 composed of the outer polymer film and the inner polymer film is continuous with the single-layer portion S2 composed of only the inner polymer film, and the side edges on both sides thermally fuse all the layers. Joined together to form a flat double cylindrical shape. This air injection valve allows the multilayer portion S1 to be located outside the airtight bag so that the single layer portion S2 is located inside. A small joint portion is partially provided in the central portion of the front end portion of the single-layered portion S2 located inside the airtight bag. Sovereignty Item 1. A gas injection valve for a gastight bag, which is formed by allowing longitudinal edges (10, 10) of a flexible, four-layer rectangular polymer film (4, 4', 5, 5'). ') An airtight bag (1) is installed in a flat, double-cylindrical shape by thermal fusion bonding and has one end located outside the airtight bag (1) and the other end located inside the airtight bag (1). The gas injection valve (2) for an airtight bag is characterized in that the polymer film (2 layers) located outside the polymer film (4, 4', 5, 5') of the above-mentioned four layers is formed ( 4, 4') is shorter than the two-layered polymer film (5, 5') on the inner side, thereby continuously forming a four-layered polymer film (4, 4', 5, 5') A single-layer portion (S2) in which polymer films (5, 5') of a portion (S1) and two layers are laminated; and a method in which the single-layer portion (S2) is located in the airtight bag (1) The portion of the layer (S1) is mounted on the airtight bag (1). International Application International Announcement Date of Entry into the Country Patent Agency Beijing Zhong Zhong Law Firm Office Address Agent Duan Chengen; Chen Haihong