Browse Prior Art Database

Printer Paper Entry Path Acoustical Seal Noise Attenuation

IP.com Disclosure Number: IPCOM000100999D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 3 page(s) / 89K

Publishing Venue

IBM

Related People

Wyne, AS: AUTHOR

Abstract

Disclosed is a means for attenuating the noise generated in a printer by the impact of print elements on the paper and by the rapid line- by-line spacing of the paper itself. This attenuation means, consisting of a group of short cylinders strung in series on a thin shaft mounted across the paper entry slot, also serves as an acoustical seal blocking the escape of internally generated noise via the paper entry slot.

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Printer Paper Entry Path Acoustical Seal Noise Attenuation

       Disclosed is a means for attenuating the noise generated
in a printer by the impact of print elements on the paper and by the
rapid line- by-line spacing of the paper itself. This attenuation
means, consisting of a group of short cylinders strung in series on a
thin shaft mounted across the paper entry slot, also serves as an
acoustical seal blocking the escape of internally generated noise via
the paper entry slot.

      Fig. 1 shows a perspective view of the printer incorporating
the present embodiment of this device.  Paper enters the machine by
moving up Entry Chute 1 and through a slot between itself and the
lower edge of Access Cover 2. Noise attenuation and acoustical seal
are affected within this slot.

      Fig. 2 shows the Attenuator Seal.  It is seen that it consists
of a multiplicity of short cylinders 3 strung together in series on
thin shaft 4.  It is apparent that due to the great difference
between the diameter of shaft 4 and the internal diameter of
cylinders 3, that the individual cylinders have considerable
independent lateral freedom. This assembly is mounted on the lower
edge of access cover 2 within the paper entry slot.

      Fig. 3 shows Section A-A of Fig. 1, in which it is seen that
cylinders 3 self-adjust their position relative to shaft 4 according
to the presence or absence and the thickness of document 5.  It is
seen that this assembly effectively maintain...