| http://www.w3.org/ns/prov#value | - The flap sealing unit 134 that is spaced a certain number of pitches from the first, second, and third heat-bonding stations 64, 66, 72 tends to suffer a sealing failure due to slight variations of the sealed position when the joined assembly thermally shrinks and the main feed drum 176 holds the joined assembly insufficiently, causing jamming or other trouble.
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