Browse Prior Art Database

Ultrasonic Embossing Tool

IP.com Disclosure Number: IPCOM000081281D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Barth, HV: AUTHOR [+2]

Abstract

It is common practice to hot-stamp material onto the surface of a workpiece. This is normally accomplished by positioning a workpiece adjacent a foil coated with heat transferable material, and then bringing the workpiece and foil together with heat and pressure. Unfortunately, the heat from a hot-stamp system can cause some types of workpiece materials to warp or deteriorate. Additionally, where movable indexing elements, such as serial numbers, are used in the hot-stamp system, heat causes portions of the indexing element to expand. Expansion can result in difficulty in moving or indexing the parts properly. Problems of warping, deterioration and improper indexing are avoided by this ultrasonic embossing tool.

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Ultrasonic Embossing Tool

It is common practice to hot-stamp material onto the surface of a workpiece. This is normally accomplished by positioning a workpiece adjacent a foil coated with heat transferable material, and then bringing the workpiece and foil together with heat and pressure. Unfortunately, the heat from a hot-stamp system can cause some types of workpiece materials to warp or deteriorate. Additionally, where movable indexing elements, such as serial numbers, are used in the hot- stamp system, heat causes portions of the indexing element to expand. Expansion can result in difficulty in moving or indexing the parts properly. Problems of warping, deterioration and improper indexing are avoided by this ultrasonic embossing tool.

In the embodiment shown, backup element 1 includes the transducer or horn of an ultrasonic generator, and the pattern 2 to be stamped is in the form of indexable numbers. Thin workpiece 3 and coated foil 4 are positioned in transferable relationship between backup element 1 and pattern 2.

In operation, element 1 is ultrasonically energized by a power source, not shown, and element 1 and pattern 2 are urged towards one another. This brings workpiece 3 and foil 4 into contact at the portions corresponding to the raised number pattern 2. The vibratory energy of ultrasonic element 1 propagates molecular motion in the heat transferable coating on foil 4, which in turn causes transfer of the coating at portions corresponding to the nu...