Is a signed contract copy as valid as the original ink signed contract?

While court's like to see original signed documents for the purpose of assuring their authenticity, copies of signatures on contracts of the nature that you described will be adequate to allow for enforcement. Many documents provide for the use of a facsimile copy of the original should the original not be available. If the document so provides, then the issue is resolved. If the document does not so state that you can use a copy,  because most documents are transmitted electronically, except in certain instances involving negotiable instruments, the copy of the original  signed document will  generally suffice.