Cutting and attaching system and universal sheet for screen protector

A cutting and attaching system for a screen protector, comprising:

• a cutting apparatus including:
• a carrying machine;
• a displacement mechanism being assembled to the carrying machine and being movable relative to the carrying machine;
• a processing module assembled to the carrying machine, wherein the processing module is electrically coupled to the displacement mechanism and is configured to move the displacement mechanism along a hole cutting path and a screen cutting path that is different from the hole cutting path, and wherein the screen cutting path corresponds to a contour of a screen of a mobile apparatus;
• and
• a cutter assembled to the displacement mechanism, wherein the cutter defines a transversal reference plane and a longitudinal plane that is perpendicular to transversal reference plane, the transversal reference plane being perpendicular to a longitudinal direction of the cutter, and wherein the cutter includes:
• a supporting segment;
• and
• a cutting segment connected to the supporting segment, wherein the cutting segment has a first lateral surface, a second lateral surface corresponding to the first lateral surface, a secondary bevel connected to the first lateral surface, and a primary bevel that is connected to the second lateral surface and the secondary bevel, and wherein a connection edge of the primary bevel and the secondary bevel is defined as a primary cutting edge that is arranged on the longitudinal reference plane;
• and
• a universal sheet that is configured to be cut to form a screen protector through a cutting process of the cutting apparatus, wherein the universal sheet includes:
• a usage layer including a hardened film and a bonding film that is formed on the hardened film, wherein a hardness of the hardened film is at least 5H;
• a buffer layer including a first buffer film attached onto the hardened film and a second buffer film that is attached onto the first buffer film, wherein a hardness of the hardened film, a hardness of the first buffer film, and a hardness of the second buffer film sequentially decrease, and wherein a thickness of the hardened film, a thickness of the first buffer film, and a thickness of the second buffer film sequentially decrease;
• and
• a bottom layer attached onto the bonding film;
• wherein, when the universal sheet is placed on the cutting apparatus under the cutting process, the bottom layer of the universal sheet is fixed to the carrying machine, the displacement mechanism is driven by the processing module to enable the primary cutting edge of the cutter to cut the buffer layer and the usage layer along the hole cutting path for forming a positioning contour that has a plurality of positioning holes, and then along the screen cutting path for forming a screen contour that is located inside of the positioning contour, such that the buffer layer and the usage layer jointly define a screen region and a positioning region that surrounds the screen region and that has the positioning holes.