Folding of paper and like material

• US 3,228,710 A
• Filed: 05/18/1965
• Issued: 01/11/1966
• Est. Priority Date: 05/18/1965
• Status: Expired due to Term

• Current Assignee: Tadeusz Chodorowski Wieslaw
• Original Assignee: Tadeusz Chodorowski Wieslaw
• Inventors: TADEUSZ CHODOROWSKI WIESLAW
• Application Number:
  US04/456,797
• Time in Patent Office: 238 Days
• US Class Current: 281/38
• CPC Class Codes: B26F 1/18 Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
• CPC Class Codes: B65H 45/28 Folding in combination with cutting cutting machines B26D
• CPC Class Codes: Y10S 229/92 Stress relief
• CPC Class Codes: Y10S 229/93 Fold detail

Claims

2. A SECTION OF PAPER SHEETS HAVING A FIRST FOLD LINE EXTENDING FROM THE RIGHT-HAND EDGE OF THE SECTION TO THE LEFTHAND EDGE OF SAID SECTION, A SECOND FOLD LINE INTERSECTING THE FIRST FOLD LINE AND SUBSTANTIALLY PERPENDICULAR THERETO, A FIRST SERIES OF SLITS EXTENDING ACROSS THE FIRST FOLD LINE FROM THE RIGHT HAND EDGE TO THE INTERSECTION OF THE FIRST AND SECOND FOLD LINES, SAID FIRST SERIES OF SLITS BEING ANGLED WITH RESPECT TO THE FIRST FOLD LINE SUCH THAT IF THE TWO END POINTS OF ANY SLIT WERE JOINED BY A STRAIGHT LINE, THAT PORTION OF SAID LINE BEGINNING AT SAID FIRST FOLD LINE AND EXTENDING UPWARDLY THEREFROM, WOUND FORM AN ACUTE ANGLE WITH THE FIRST FOLD LINE, AND A SECOND SERIES OF SLITS EXTENDING ACROSS THE FIRST FOLD LINE FROM THE LEFT-HAND EDGE TO THE INTERSECTION OF THE FIRST AND SECOND FOLD LINES, SAID SECOND SERIES OF SLITS BEING ANGLED WITH RESPECT TO THE FIRST FOLD LINE SUCH THAT IF THE TWO END POINTS OF ANY SLIT WERE JOINED BY A STRAIGHT LINE, THAT PORTION OF SAID LINE BEGINNING AT SAID FIRST FOLD LINE AND EXTENDING UPWARD THEREFROM, WOULD FORM AN OBTUSE ANGLE WITH THE FIRST FOLD LINE.