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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B31D
MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
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3/00
Making articles of cellular structure, e.g. insulating board
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B31D3/02
honeycombed structures; , i.e. the cells having an essentially hexagonal section
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B31D3/0292
involving auxiliary operations, e.g. expanding, moistening, glue-applying, joining, controlling
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