| (19) |
 |
|
(11) |
EP 0 280 411 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.11.1990 Bulletin 1990/47 |
| (43) |
Date of publication A2: |
|
31.08.1988 Bulletin 1988/35 |
| (22) |
Date of filing: 28.01.1988 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
28.01.1987 IE 21587
|
| (71) |
Applicant: DATAPRODUCTS (DUBLIN) |
|
Coolock
Dublin 17 (IE) |
|
| (72) |
Inventor: |
|
- Coyle, Brendan Vivian
Bailey, Howth, County Dublin (IE)
|
| (74) |
Representative: Hackett, Sean James et al |
|
MARKS & CLERK,
57-60 Lincoln's Inn Fields
London WC2A 3LS
London WC2A 3LS (GB) |
|
| |
|
| (54) |
A spool for an inked ribbon |
(57) An inked ribbon spool 1 for a printer comprises a drum 2 having a bore 4 for reception
of an idler spindle. Flanges 6 are provided on each side of the drum 2 and an annular
internal involute bear 10 driven by a pinion 17. The gear drive mechanism allows a
positive rotation of the spool 1 to be accurately controlled with low torque for controlled
acceleration and deceleration. A ribbon is secured to the spool by engaging a fixing
barb 15 in a transverse slot 11 in the drum and/or by engaging a ball shot in a square
hole 24 in the drum 2.