Here are a few examples of some illustrations etched in some HomeDepot plywood I did over the past few nights. I can really appreciate the benefits of Proofgrade after burning a bunch of wood before i get the settings dialed in.
Good thing about working with a bunch of creatives is a have a endless supply of cool things to engrave.
I like the patent diagrams as well… which led to a little bit of searching.
I’m not a copyright lawyer, so don’t take this as a final word, but this is promising:
“Patents are published as part of the terms of granting the patent to the inventor. Subject to limited exceptions reflected in 37 CFR 1.71(d) & (e) and 1.84(s) , the text and drawings of a patent are typically not subject to copyright restrictions. The inventors’ right to exclude others from making, using, offering for sale, or selling the invention throughout the United States or importing the invention into the United States for a limited time is not compromised by the publication of the description of the invention.”
I’ve found that birch cuts perfect at 80/22 with no marks on the back, and 75/300 gives about 1/2 thickness on engrave. Only other non proof grade I have used is mahogany and it’s 1/4 thick so 100/20 for cut and 85/300 for 1/2 thickness engrave
) engravings… Penny for detail