Device for reducing the emission of noise in buckle folding mach

Details Device for reducing the emission of noise in buckle folding mach Device for reducing the emission of noise in buckle folding mach

1981-06-16

1982-06-29

Hix, L. T.

Acoustics

Sound-modifying means

Housing or enclosure

493420, G10K 1100, B65H 4514

Patent

active

043368620

ABSTRACT:
A device for reducing the emission of noise in buckle folding units provided with noise control enclosures, comprising a noise control hood 5 essentially completely enclosing the upper 41 and lower folding pockets 42 and the folding rolls 7, said noise control hood 5 being at least partially slidingly displaceable, tiltable and/or removable and being provided with a slot for the passage of the sheet in the associated hood section, which slot is aligned with the nip of the pair of intake and discharge rolls, respectively, is improved by further reducing the noise emission in the sheet discharge area without influencing dependable function and easy access to this area. This is obtained by the fact that the hood section associated with the pair of discharge rolls 71, 72 comprises a cover plate 10 having a vertical first section 12 secured to the hood and a second section 11 held on the first section 12 pivotably between an inclined closed position adjoining to the hood and an opened position above the folding rolls 7, wherein the longitudinal edges, being parallel to the roll axes, of the discharge slot 15 provided in the vertical section 12 are arranged such as to form noise emission sealing sites in cooperation with the peripheral surfaces of the pair of discharge rolls 71, 72.

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