Nail-free seamless paper corner protector frame formed in one step and manufacturing method thereof

• Main Author: MA CHIKAI
• Format: Patent
• Language: Chinese; English
• Published: 20.07.2016
• Subjects: MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER; MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN AMANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSESB31B OR B31C; PERFORMING OPERATIONS; TRANSPORTING; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER

The invention discloses a nail-free seamless paper corner protector frame formed in one step. The nail-free seamless paper corner protector frame formed in one step comprises paperboards and is of a multilayer structure formed by winding the paperboards; the paperboards are coated with adhesives, and every two adjacent paperboards are staggered and adhere to each other through the adhesives; the paperboards are provided with indentations. According to the nail-free seamless paper corner protector frame formed in one step, punching, indenting, corner folding and adhesive applying are carried out on bobbin paper in advance, then the bobbin paper winds around a die circle by circle and gets pressed and bonded for forming a whole body, every two adjacent layers of the bobbin paper can be bonded and connected through the adhesives such as glue because the punching positions of every two adjacent layers of the bobbin paper are staggered, and therefore the purposes of turning corners and avoiding nailing connection