The patent [0] does seem a bit more extensive than just wrap it in a membrane. It discusses using venting/gas pressure (from depressing the key) to expel debris, for instance.
[0] http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20180068808&IDK...
Re:The Great Apple Keyboard Cover-Up
by JustSomeNobody on Friday July 13, 2018 @11:09PM
(#17528584)
Sad because the patent wouldn't have been needed in the first place if they didn't feel the need to go so thin.
This is a pretty sad day that sonething like this can be patented..
Anything wrapped in a cover can “prevent and/or alleviate contaminant ingress”
Does any patent office in the world really think nobody has thought of this before?