The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 1989
Filed:
Feb. 10, 1988
Applicant:
Inventor:
Benoit Hoeft, Kaysersberg, FR;
Assignee:
Kaysersberg S.A., Kaysersberg, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01G / ;
U.S. Cl.
CPC ...
47-9 ; 111200 ;
Abstract
A machine for laying plastic film on a substrate which comprises supporting rollers (32 to 37) on which drum (16) is placed. One of the chassis wheels (6, 8) drives the drum through a transmission system (40) including a mechanical variable speed drive (60) enabling the transmission ratio between the traction wheel and the drum drive rollers to be varied. It is thereby possible to limit the tension forces exerted on the film when laying the film, making it possible to adapt the film to an uneven substrate, such as furrows or ridges on the ground in agricultural uses.