Method and device for folding a paper web

Details Method and device for folding a paper web Method and device for folding a paper web

1990-08-13

1991-09-03

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

With coating

493418, 493450, B31B 136, B31B 162

Patent

active

050450441

ABSTRACT:
A method for folding a paper web in which a liquid folding adjuvant is applied along a folding line so that an improved fold is produced which is sharper if the liquid folding adjuvant is heated, preferably in a continuous flow heater, to a temperature of the order of 30.degree. C. to 60.degree. C. dependent on the type of paper being processed.

REFERENCES:
patent: 2847196 (1958-08-01), Franklin et al.
patent: 3134706 (1964-05-01), Alexander
patent: 3179341 (1965-04-01), Ploj et al.
patent: 3530774 (1970-09-01), Booth
patent: 3590775 (1971-07-01), Barr
patent: 3808088 (1974-04-01), Knechtges et al.
patent: 3821055 (1974-06-01), Fairbanks et al.
patent: 4141544 (1979-02-01), Birkenmayer
patent: 4313899 (1982-02-01), Hain
IBM Technical Disclosure Bulletin, vol. 17, No. 4, pp. 1098-1099, Sep. 1974.

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