Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE506909ApublicationCriticalpatent/BE506909A/xx
B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
B26F1/06—Perforating by punching, e.g. with relatively-reciprocating punch and bed with punching tools moving with the work
B26F1/08—Perforating by punching, e.g. with relatively-reciprocating punch and bed with punching tools moving with the work wherein the tools are carried by, and in operation move relative to, a rotative drum or similar support
B—PERFORMING OPERATIONS; TRANSPORTING
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D28/00—Shaping by press-cutting; Perforating
B21D28/24—Perforating, i.e. punching holes
B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
B—PERFORMING OPERATIONS; TRANSPORTING
B26—HAND CUTTING TOOLS; CUTTING; SEVERING
B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
