Browse Prior Art Database

Ink Ribbon Cassette

IP.com Disclosure Number: IPCOM000112361D
Original Publication Date: 1994-May-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 62K

Publishing Venue

IBM

Related People

Minami, K: AUTHOR [+2]

Abstract

Disclosed is a structure of ink ribbon cassette adapted for a compact dot-impact printer of which printing head is arranged in a direction of perpendicular as shown in Fig. 1. In this arrangement, disclosed is an improvement of the structure for avoiding a jam of ribbon arisen from gravitation as shown in Fig. 2.

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

Ink Ribbon Cassette

      Disclosed is a structure of ink ribbon cassette adapted for a
compact dot-impact printer of which printing head is arranged in a
direction of perpendicular as shown in Fig. 1.  In this arrangement,
disclosed is an improvement of the structure for avoiding a jam of
ribbon arisen from gravitation as shown in Fig. 2.

      Fig. 3 shows an improved structure of the cassette.  As shown
in Fig.  3, a ribbon 1 enclosed with a base cover 2 and a top cover
(not shown in Fig. 3) is twisted by 90 degrees at the both of
entrance and exit portions of the folded ribbon 1.  The cassette is
arranged as shown in Fig. 4 so that the folded ribbon plane is always
perpendicular to the direction of gravity just the same as the
conventional printer.

      As shown in Fig. 5, a ribbon drive mechanism is attached to the
top cover 4 for easy replacement of the cassette, since the ribbon
drive mechanism is turned along with the ribbon cassette.  The gear 6
sticks out from the top cover to transmit the torque from a fixed
timing belt as shown in Fig. 6.  Rotating of the gear 6 makes rotate
the shaft 5 of the ribbon feed roller 3 (Fig. 3) via planetary gears
for obtaining the constant direction.

      In this way, the desk space for the printer can be minimized
with this disclosure.  Furthermore, the depth of the ribbon cassette
is considerably reduced as shown in Fig. 7.