A conveyer (5, 5ʹ, 8), particularly for machines for measuring irregular sheetlike materials, such as cattle or animal hides (0), is provided, whereby hide spreading, is made before, during and after mensuration. Over one or more bottom conveyers (5, 5ʹ) an upper conveyer (8), of the same kind, comprised with endless cords or strips, is provided which engages the upper surface of the hides (0) being meausred, whereby the hides being moved, are vertically forced against its main surfaces thus giving to them an even attitude during mensuration. The conveyer endless members (50, 50ʹ; 80, 80ʹ) or the respective cylinder grooved rims (4ʺ) are ideally divided in diverging ranks (50, 50ʹ; 80, 80ʹ), whereby the hides being moved and measured are further subjected to stretching, spreading them outwardly to the fullest extent, by forces suitably working, in a strictly parallel direction to the same hides.