A U.S. appeals court on Friday showed few signs it was prepared to support a request by Apple Inc to block immediately the sale of some Samsung Electronics <005930.KS> smartphones and tablets.

In a high-stakes patent dispute, the court heard argument about whether a federal judge acted properly in December when she ruled that Apple failed to provide enough evidence to support an injunction of Samsung's Galaxy line of products.

The appeals court judges reacted with scepticism to a premise put forward by Apple's lawyer, who said that for the purpose of getting an injunction, Apple does not have to show that patent infringement would directly cause a loss of customers.

(Reporting by David Ingram; Editing by Padraic Cassidy)