Gerhard Hartwich

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Krefeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Calender having an end roll associated with a supplementary roll
- Patent number 5,947,017
- Issue date Sep 7, 1999
- Voith Sulzer Finishing GmbH
- Gerhard Hartwich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Calender and method of operating the same
- Patent number 5,029,521
- Issue date Jul 9, 1991
- Kleinewefers GmbH
- Josef Pav
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Guard for the nips of rolls in calenders
- Patent number 4,867,055
- Issue date Sep 19, 1989
- Kleinewefers GmbH
- Egon Hutter
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Apparatus for convoluting webs of paper or the like
- Patent number 4,491,283
- Issue date Jan 1, 1985
- Kleinewefers GmbH
- Josef Pav
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Calender
- Patent number 4,434,713
- Issue date Mar 6, 1984
- Kleinewefers GmbH
- Gerhard Hartwich
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Bearings for calender rolls and supports therefor
- Patent number 4,347,784
- Issue date Sep 7, 1982
- Kleinewefers GmbH
- Josef Pav
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE