Tools for forming a separation line in a pack of food cups

A knife for an equipment for forming a precut in a pack of food cups, said precut facilitating separation by breaking along a separation line between two food cups, wherein the knife comprises a cutting part configured for making a precut groove or a full cut along the separation line, wherein said cutting part extends along a first longitudinal axis, such that, seen in section perpendicular to the longitudinal axis, the cutting part extends on either side a transverse axis and the cutting part comprises:

• on one side of the transverse axis:
• a first portion extending between a first point forming an end of the cutting portion and a second point, wherein a straight line connecting the first and second points forms a first angle with the transverse axis comprised between 20° and 40°;
• and
• a second portion extending between the second point and a third point, wherein a straight line connecting the second and third points forms a second angle with the transverse axis comprised between 15° and 25°;
• and
• on an other side of the transverse axis:
• a third portion extending between the first point and a fourth point, wherein the fourth point coincides with the transverse axis;
• and
• a fourth portion extending from the fourth point to a fifth point, wherein the fifth point is symmetric to the third point about the transverse axis, and wherein the straight line connecting the fourth and fifth points forms a third angle with the transverse axis comprised between 15° and 25°.