(19)
(11) EP 0 200 707 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.09.1987 Bulletin 1987/40

(43) Date of publication A2:
05.11.1986 Bulletin 1986/45

(21) Application number: 86870059

(22) Date of filing: 28.04.1986
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 29.04.1985 US 728559

(71) Applicant: Monsanto Company
 ()

(72) Inventors:
  • Russell, Gerald O.
     ()
  • Van Dyke, James R.
     ()

   


(54) Installation of highway drainage mat


(57) Installation in a narrow trench of an elongated drainage mat which is not bendable in the plane of its base which is maintained in a vertical orientation. The installation is effected.by deflecting the top edge of the mat into a wave configuration to shorten the effective length of the top edge to cause the mat to follow a curve lying in a vertical plane within a narrow width.






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