Browse Prior Art Database

Print Hammer

IP.com Disclosure Number: IPCOM000045265D
Original Publication Date: 1983-Feb-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Hasler, W: AUTHOR [+2]

Abstract

This article describes a resilient, strip-shaped print hammer of soft magnetic material which is electromagnetically actuated, utilizing the resilience and leverage at a first stop.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Print Hammer

This article describes a resilient, strip-shaped print hammer of soft magnetic material which is electromagnetically actuated, utilizing the resilience and leverage at a first stop.

Print hammer 3 consists of a flat metal strip of elastic, soft magnetic material and is arranged opposite a magnet yoke with energizing coil 2 (Fig. 1). The print hammer, firmly clamped at one end, is kept in its rest position at its other end, carrying print tip 7, by a holding magnet 4 with pole shoe 5 and damper 6.

Yoke 1 is arranged approximately in the center between clamping point 13 and the first spherical stop 8. In the rest position, there is an air gap between pole face 9 of yoke 1 and print hammer 3.

Upon energization of energizing coil 2, print hammer 3 in the area between clamping point 13 and first stop 8 is pulled towards pole face 9, thus being bent. The leverage exerted on the first stop 8 detaches the print hammer from holding magnet 4, so that print tip 7 impacts a dot holder 11 with a dot 12 (Fig. 2). A second stop 10 is provided opposite the first stop 8.

The arrangement of Fig. 3 shows one of several dot holders 11 for forming a matrix column of dots 12.

The above described print hammer is also suitable for line printers.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]