J4 was established in 1994 and deals with the development and production of cyclothermic tunnel band baking ovens and with delivering complete baking and bakery lines and bakeries. The ovens are not only designed for baking rye, rye-wheat or wheat bread, but also various types of bread and pastries, fancy breads, pies, stuffed cakes, cookies, gingerbread, sponge cake biscuits, salted sticks and numerous other baked products.