초록 ▼

A device for the manufacture of a frozen aerated product which includes a freezer, a pump for introducing a frozen aerated product mix and air into the freezer, a tubular crystallizer system having upstream and downstream ends and having a longitudinal shaft within and extending beyond the ends of t

A device for the manufacture of a frozen aerated product which includes a freezer, a pump for introducing a frozen aerated product mix and air into the freezer, a tubular crystallizer system having upstream and downstream ends and having a longitudinal shaft within and extending beyond the ends of the crystallizer system through seals, a ram for reciprocating the longitudinal shaft upstream and downstream, the longitudinal shaft being provided with one or more scrapers in a transverse plane along its length which divide the crystallizer system into compartments, whose perimeters are adjacent to and capable of scraping the internal wall of the crystallizer system and whose bodies are provided with at least one longitudinal channel, a high pressure stuffing pump for feeding the frozen aerated product from the freezer to the crystallizer system, a jacket containing a heat transfer fluid for removing heat from the frozen aerated product within the crystallizer system, and a backpressure valve for conveying the frozen aerated product out of the crystallizer system.

대표청구항 ▼

[ What is claimed is:] [14.] A method for the manufacture of a frozen aerated product which comprises introducing a frozen aerated product mix and air into a freezer, feeding the frozen aerated product via a valve from the freezer to an upstream end of a tubular crystallizer system comprising upstre

[ What is claimed is:] [14.] A method for the manufacture of a frozen aerated product which comprises introducing a frozen aerated product mix and air into a freezer, feeding the frozen aerated product via a valve from the freezer to an upstream end of a tubular crystallizer system comprising upstream and downstream compartments, upstream and downstream ends, and a longitudinal shaft extending beyond the ends of the crystallizer system through seals, the longitudinal shaft being provided with one or more scrapers in a transverse plane along its length capable of dividing the crystallizer system into compartments, the scrapers having perimeters adjacent to and capable of scraping the internal wall of the crystallizer system and bodies provided with at least one longitudinal channel, reciprocating the longitudinal shaft in a longitudinal direction in downstream and upstream strokes so that on the downstream stroke, frozen aerated product from the freezer enters the upstream compartment of the crystallizer system and frozen aerated product in the downstream compartment is pushed out of the crystallizer system by the scraper at the downstream end, and on the upstream stroke, and, on the upstream stroke, frozen aerated product upstream of a scraper traverses the longitudinal channel to a position downstream of the scraper, and removing heat from the frozen aerated product within the crystallizer system.