Picture frame, has pattern frame that is made of metal sheet as closed frame through hydro formation and includes no mitre joints at its three-dimensionally formed corners

摘要

The frame has a base part and a pattern frame, which are connected with one another. The pattern frame is made of a metal sheet as a closed frame through hydro formation and has no mitre joints at its three-dimensionally formed corners. A surface of the pattern frame is mechanically roughened, brushed and polished and has a recess (26) and/or a ridge, which forms a sample.