Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B31
MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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B31F
MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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1/00
Mechanical deformation without removing material, e.g. in combination with laminating
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B31F1/0003
Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
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B31F1/0045
Bending or folding combined with joining
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B31F1/0048
Bending plates, sheets or webs at right angles to the axis of the article being formed and joining the edges
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B31F1/0061
for making articles of indefinite length
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