The ornamental design for cartridge for coffee machines, as shown and described.
1.-4. Cartridge for coffee machines
1.1 : Perspective
1.2 : Bottom
1.3 : Front
1.4 : Right
1.5 : Top
2.1 : Perspective
2.2 : Bottom
2.3 : Front
2.4 : Right
2.5 : Top
3.1 : Perspective
3.2 : Bottom
3.3 : Front
3.4 : Right
3.5 : Top
4.1 : Perspective
4.2 : Bottom
4.3 : Front
4.4 : Left
4.5 : Right
4.6 : Back
4.7 : Top
Four designs of capsules to be used in beverage preparation machines to produce beverages by passing hot water through a substance contained in the capsule; for designs 1, 2, 3 the left view is identical to the right view and the back view is identical to the front view; for designs 1, 3, 4 stipple shadings indicate opaque surfaces, while linear shadings indicate shiny surfaces.