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Acoustical Damping System for Printers Disclosure Number: IPCOM000042825D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04

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Varhma, R [+details]


In printers, paper web 10 moves along a curved path from the print station to a collection station where it is folded into a stack. The taut paper web 10 acts as a clamped thin plate which, when impacted by printer hammers 11, produces an array of nodal vibrations both in the lateral and longitudinal directions. Vibration waves generated by hammer impacts travelling along the web 10 radiate noise into the surrounding air mass particularly in the region under where web 10 bends or is curved as it moves along a guide structure 12 beneath the cover 13 of the printer housing. An acoustical damping system comprises a damping chamber 14 located below web 10 in the region of the bend.