(19)
(11) EP 0 453 943 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.08.1993 Bulletin 1993/32

(43) Date of publication A2:
30.10.1991 Bulletin 1991/44

(21) Application number: 91106150.5

(22) Date of filing: 17.04.1991
(51) International Patent Classification (IPC)5: B65H 20/04, B65H 20/02, B31B 1/04
(84) Designated Contracting States:
BE CH DE ES FR GB IT LI

(30) Priority: 24.04.1990 IT 5933890 U

(71) Applicant: IMMOBILIARE PANOTEC S.r.l.
I-31038 Paese - Fraz. Castagnole (TV) (IT)

(72) Inventor:
  • Fabris, Bruno
    I-31038 Paese (Treviso) (IT)

(74) Representative: Modiano, Guido, Dr.-Ing. et al
Modiano & Associati S.r.l. Via Meravigli, 16
I-20123 Milano
I-20123 Milano (IT)


(56) References cited: : 
   
       


    (54) Locking device structure particularly for traction-fed cardboard


    (57) The locking device structure includes a polygonal plate (12a) having a counter roller (18) pivoted thereto, the counter roller (18) being arranged above a driven roller (4). An actuation piston (6) is pivoted to an upper corner of the plate (12a), which is also provided at a lower corner with a presser plate (16). Extension of the piston (6) provides traction feeding of cardboard (14) between the rollers (4,18) whereas retraction of the piston (6) releases the traction and further blocks the feed of cardboard (14) due to engagement of presser plate (16) on abutment surface (19).






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