| 摘要 |
1,256,305. Seaming non-metallic sheet material. EASTMAN KODAK CO. 14 Feb., 1969 [19 Feb., 1968], No. 8209/69. Heading B5K. [Also in Divisions B2 and G2] In Example 2, a high gloss or a matte surface polyethylene coated paper is heat sealed by lapping together coated and uncoated surfaces and passing a sealing iron heated to 380‹ F. over the paper to form a peelable heat seal or by lapping together two coated surfaces and passing a sealing iron heated to 270‹ F. over the paper to form a tearing heat seal.
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