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Mechanically Locked Dot Band Attachment

IP.com Disclosure Number: IPCOM000043795D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR

Abstract

An attachment method is provided for the attachment of a dot-producing element to the flexible segment of a steel band in a dot band matrix printer. A clearance hole 11 (Fig. 1) is provided within the flexible segment 12 of the band which accommodates a circular portion 13 of the dot-producing element 14. The element 14 is then fastened to the band segment by means of a crimping ring 15 which has a hole 16 that fits over and is mechanically locked onto channel 17 by means of swaging tooling, resulting in a fastened assembly (Fig. 2). The swaging tooling capable of producing the attachment and extraction of the parts (Fig. 3) uses a nest 18 to align the hardened steel dot-producing element 14 concentrically with ram 19, ram 20 and ejector pin 21.

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Mechanically Locked Dot Band Attachment

An attachment method is provided for the attachment of a dot-producing element to the flexible segment of a steel band in a dot band matrix printer. A clearance hole 11 (Fig. 1) is provided within the flexible segment 12 of the band which accommodates a circular portion 13 of the dot-producing element 14. The element 14 is then fastened to the band segment by means of a crimping ring 15 which has a hole 16 that fits over and is mechanically locked onto channel 17 by means of swaging tooling, resulting in a fastened assembly (Fig. 2). The swaging tooling capable of producing the attachment and extraction of the parts (Fig. 3) uses a nest 18 to align the hardened steel dot-producing element 14 concentrically with ram 19, ram 20 and ejector pin 21. Ram 19 is engaged downward until contact with the belt 12 is made, and then ram 20 swages the crimping ring 15 by the application of downward force, causing the soft steel material of the ring to flow into channel 17 without deformation of the band segment. Ram 20 is then withdrawn upward followed by ram 19, causing ejector pin 21 to dislodge the fastened assembly. An alternative tooling method (Fig. 4), capable of performing the same attachment, incorporates a dot-producing element 14, having a tapered section 22, along with a conical segment 23 of the ram element 24, facilitating rapid alignment with the crimping ring 15 and enabling smooth ejection of the three-piece assembly. By...