| 摘要 |
A tear line forming mechanism for pop-up tissue paper package film includes a carrier rack, a driving device, a rail mechanism, a shifting mechanism, a pair of couplers, and a rotary cutter holder. The rotary cutter holder is rotatably coupled to the couplers through bearing elements of the couplers and set between the couplers. At least one cutter slot is formed in the rotary cutter holder to receive and hold therein a cutter. A cutter holder gear is coupled to an end of the rotary cutter holder and mates a rack. When the rotary cutter holder is moved in unison with the couplers, the cutter holder gear is caused by being in mating engagement with the rack to rotate in order to proceed with forming tear lines that delimit a package film opening in a pop-up tissue paper package film positioned on an anvil. |
| 主权项 |
1. A tear line forming mechanism for pop-up tissue paper package film, comprising:
a carrier rack; a shifting mechanism, which is mounted to the carrier rack and is movable in a shifting direction between a first extreme position and a second extreme position; a pair of couplers, which are mounted to the shifting mechanism to be movable in unison with the shifting mechanism in the shifting direction between the first extreme position and the second extreme position, the couplers comprising therein bearing elements; a rotary cutter holder, which is rotatably coupled to the pair of couplers through the bearing elements of the pair of couplers and is set between the pair of couplers, the rotary cutter holder being movable in unison with the couplers in the shifting direction between the first extreme position and the second extreme position; at least one cutter slot, which is formed in a predetermined location in the rotary cutter holder to receive and hold at least one cutter; a cutter holder gear, which is coupled to one end of the rotary cutter holder; a rack, which is mounted on the carrier rack to extend in the shifting direction and mate the cutter holder gear; and an anvil, which is mounted to the carrier rack and located below the rotary cutter holder, the anvil being adapted to carry and support at least one pop-up tissue paper package film for forming a package film opening in the pop-up tissue paper package film; wherein when the rotary cutter holder is movable with the couplers in the shifting direction between the first extreme position and the second extreme position, the cutter holder gear is caused by being in mating engagement with the rack to rotate in a rotation direction between a first rotation dead point and a second rotation dead point in order to form tear lines that delimit the package film opening in the pop-up tissue paper package film supported on the anvil. |
