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Browse Prior Art Database

Acoustic Shield Materialized by Two Different Axes

IP.com Disclosure Number: IPCOM000121919D
Original Publication Date: 1991-Oct-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Matsushita, K: AUTHOR

Abstract

Disclosed is a mechanism that enables shielding and absorbing the noise of a printer when the front cover is closed, and it provides the operator the wide paper path when the cover is open. A key mechanism is controlled by those two different axes, covers and acoustic sheets.

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This is the abbreviated version, containing approximately 100% of the total text.

Acoustic Shield Materialized by Two Different Axes

      Disclosed is a mechanism that enables shielding and
absorbing the noise of a printer when the front cover is closed, and
it provides the operator the wide paper path when the cover is open.
A key mechanism is controlled by those two different axes, covers and
acoustic sheets.

      In the noise control of the printer, it is known that shielding
the paper entrance area of the cover is one of the most effective
counter measurements to be done. The former technology was to just
shield with one curled sheet and it was not designed for open/close
cover. However, it has a risk of paper jamming because the resistance
for feeding paper may be increased by shielding the cover opening.

      Fig. 1 shows the condition when the front cover is closed. The
acoustic sheet is shown as a curved line between "O" and "OP". In
this condition, the only force to push the paper by this sheet is its
own elasticity, and its soft surface prevents the irregular load for
paper feeding from jamming and skewing. When the cover is open, as
shown in Fig. 2, the sheet is stretched and will not be an obstacle
when the operator handles tractors to set forms. This mechanism is
based on the two different axes, "X" as an axis of the front cover,
"O" as an axis of the acoustic sheet.