Читать книгу Essentials of Thermal Processing - Gary Tucker S., Gary S. Tucker - Страница 17

The equipment used in canneries also had to develop significantly. Originally, cans were manually soldered closed, and good artisans could do about 6 an hour. Once the hermetic double seam was invented, closing of cans became much faster. Today, there are seamers that can close over 1000 cans per minute.