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GB1021794A
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Method and apparatus for straightening laterally curved metal bands
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GB982478A
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Apparatus for producing helical seam pipes
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GB1060635A
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Apparatus for forming strip stock into a helically wound pipe formation
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US3229881A
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Strip stock feeding mechanism with tensioning means
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GB969433A
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Apparatus for electric resistance lap-seam welding
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US3239618A
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Apparatus for guiding strip stock
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US3267570A
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Method for measuring and controlling the width of the welding gap in the production of helical seam pipe
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GB950411A
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Apparatus for feeding strip stock to a helical seam pipe making machine
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GB996133A
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Method and apparatus for producing tubular metal bodies with welded helical seams of strip stock
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US3217402A
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Method and apparatus for producing tubular metal bodies with welded helical seams of strip stock
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US3227345A
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Apparatus for feeding strip stock to a helical seam pipe making machine
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ES273393A1
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A procedure for the manufacture of a pipe of various cameras (Machine-translation by Google Translate, not legally binding)
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CA757359A
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Method and apparatus for producing helically welded tubing
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CA761740A
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Strip stock feeding mechanism
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CA769609A
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Apparatus for guiding strip stock
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CA678208A
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Apparatus for feeding strip stock to a helical seam pipe making machine
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CA764578A
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Method of measuring and controlling the width of the welding gap in the production of pipe
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