Patent ID: 7959002
Filing Date: 2011-06-14
Classification: B65D

Abstract:
1. A multilayer air enclosure with different kinds of substrates, adapted to cover an article thereby providing a cushioning protection, and including an air cylinder sheet, the air cylinder sheet comprising: two outer films, stacked together vertically; two inner films, positioned between the two outer films; an air filling passageway, being a space formed by sticking the two outer films together by a first hot sealing portion and a second hot sealing portion, wherein the first hot sealing portion sticking the two outer films, the second hot sealing portion sticking the two outer films to the two inner films; a plurality of hot sealing points, positioned between the first hot sealing portion and the second hot sealing portion so as to lie in the air filling passageway, each hot sealing point lying in between one sheet of the outer films and one sheet of the inner films to stick one sheet of the outer films to one sheet of the inner films; at least one chamber, disposed at one side of the air filling passageway, being an air storing space formed by sticking the two outer films together by means of hot sealing and providing the article with the cushioning protection; and at least one air entering passageway, connected to the air filling passageway and the air chamber, formed by spreading a heat resistant material distantly and sequentially on one face of one of the inner films, the face then not stuck to a face of the other one of the inner films by the hot sealing, the outer films being forced apart outwardly when outside air enters and expands the air filling passageway, the two sheets of the unstuck inner films being driven to pull apart outwardly by the hot sealing points to open the air entering passageway, causing the outside air in the air filling passageway entering the air chambers through the air entering passageway to allow the air chambers to be filled with air and expanded, the outside air entering the air cylinder and then compressing the inner film to cover the air entering passageway to shield the air chamber; and a sheet body, closely attached onto one side of the air cylinder sheet used to prevent air cylinder sheet damage due to piercing.