Патент USA US2402931код для вставки
Patented June 25, 1946 2,402,931 _UNITED STATES PATENT foFFlcE ....lcîhîîîïìîîfïïîïîm. 3 Claims. 1 (Cl. 62-114) ’ . This invention pertains to an ice cream ma _' chine, used in the continuous production of ice cream or frozen confection, wherein a suitable, mix is introduced at one end of the machine and the frozen productv in edible condition is dis charged at the other end thereof. ' ' 2 In the drawing there is illustrated a machine _ This invention is more particularly directed to a. mechanism which will continuously> process an ice cream mix by centrifugally maintaining the particles of the mix in a thin film about a freezing embodying the invention comprising a base I0 for supporting a horizontally-disposed cylindrical. housing I I. Said housing embraces at one end a minorcompartment t2 separated from a maior compartment I3 by a separating wall I4. The maior compartment I3, between the wall I4 and the discharge end of the machine,- _encloses a refrigerating or freezing cylinder I5, said lcylin der -being provided with‘a pair of. spaced con centric walls between which refrigerant carrying surface and continuously scraping or peeling thev thin frozen film> produced thereby from said . tubes or passages I6 are provided. Mounted axi freezing surface, and carrying it by such scrap ally of the cylinder I5 for rotation therein, there ing and peeling action to the discharge end of is a 'drive shaft I 'I supported by a bearing I8 at the machine, whereupon it is discharged in fin .6 the discharge end of the housing II and by bear ished edible form. As a result of such action the ing I9 in the partition wall I 4. finished product is developed with a velvety tex ture of only approximately twenty-five percent . 0n the extension of the shaft I'I there is pro I vided a driving pulley 20 mounted in the com overrun as compared with the usual ñfty percent partment I2 and driven by a belt 2| from a motor overrun, but without being compressed, packed 20 22 supported upon a frame 23 in the base of the or re-frozen. Thus the product maintains its compartment I0. The motor drive and belt are original soft texture as compared with a frozencrystal texture of the higher overrun re-frozen ice creams. so designed as to drive the shaft I1. at about 350 R. P. M. Also, mounted within the base I0 there is a. compressor 24 connected with the refrigerant 'I'his mechanism is so designed that the ice 25 passages or pipes I6 for refrigerating the internal cream mix is kept in constant motion on the freezing surface of the freezing cylinder I5. In freezing wall of the machine, and the layer of mix on the wall is such as to eñ’ect proper heat transfer at such a rate that the freezing time is reduced to a minimum., The pitch of the scrap ing and feeding blades, and the angular velocity this connection, it is desirable to maintain the inner freezing surface of said cylinder at approxi mately ñve degrees Fahrenheit. - The ice cream or frozen confection mix is con tained in avessel 25 mounted on the top of the housing II and communicating with a hopper 2B through an oriñce'controlled by a valve 21. The hopper 26 communicates With the interior of the instant freezing is completed. ' 35 cylinder I5 through a discharge opening 28 in 'I'he period that the product remains in the the partition wall I4. At the other end or dis machine is estimated to be from ten to fifteen charge end of the cylinder there is a diaphragm seconds within which time full freezing of the supporting the bearing I8 in which there is a dis product is completed, instead of the eighteen to charge orifice 3|! communicating with an exterior of said blades is such that the mix is moved parallel to the axis of the-mechanism at such velocity as to arrive at the discharge end at the forty-eight hours formerly required to freeze ice cream. Thus, the freezing time, with the con sequent crystal growth, is greatly reduced. 'I'he full nature of the invention will be under stood from the accompanying drawing and the following description and claims: , ` Fig. 1 is a central longitudinal section through the machine. ' ~ Fig. 2 -is a section taken on the line 2_2 of Fig. 1. v ly and forwardly extending discharge spout 3I. The shaft I1 carries within the major portion of the cylinder a series of dìametrically opposed scraper blades 32 extending at an angle to the shaft with their outer edges curved to conform ' and lie adjacent the inner wall of the cylinder I5 to effect a scraping action about the freezing surface. Each blade is carried by a hub 33 through a reduced end portion 34, said hub being keyed or otherwise secured to the shaft I 1 for Fig. 3 is a section taken on the line 3-3 of 50 rotation-therewith. The length of the respective Fig. 1. hubs is such that they abut each other end to Fig. 4 is a side elevation of the scraper blade - end, each adjacent hub carrying its blade at about with its bearing in section. ' a sixty degrees angle to the preceding and fol Fig. 5 is an enlarged section taken on the line lowing blade. As shown herein there are six such 5_5 of Figui. ' , ~ vb. blades carried by the shaft in overlapping rela 2,402,9s1 3 4 . tion relative to each other, progressively spaced at sixty degree intervals about the shaft and freezing wall of the cylinder. The rearwardmost blade rotates adjacent the wall Il to pick up the mix as it is introduced into the cylinder through the orince 28. By centrifugal force due to the rapid rotation said shaft in staggered relation, each of said blades being biased to extend at an angle to the axial center of said shaft and formed with a concave scraping face curved to conform with the cylindrical surface of said chamber, means for directing the mix to bevfrozen into one end thereof, the _mix is spread about the freezing of said chamber to be scraped by said blades along the wall of said chamber toward the other wall in a thindllm, suchthat it is rapidly frozen. end thereof, and means for continuously dis- - the mix not only maintains it in freezing con a cylindrical freezing chamber for continuously along the freezing wall to the forward or dis tion at the other end thereof, a shaft rotatably But such frozen nlm is continuously scraped by 10 charging the frozen confection from said ‘last mentioned end of said chamber. . the respective blades, and due to their angular 2. A machine for producing an edible frozen disposition carried forwardly from one blade to the next. Thus.- the centrifugal force applied to ' confection in a continuous operation, including receiving at one end a mix to b_e frozen and tact with the wall of the cylinder. but itis caused to constantly` move ,thereabout and forwardly ‘ continuously discharging edible frozen confec charge end. » mounted axially of said cylinder, means for rotat- ' ing said shaft, and a series of scraper blades progressively mounted along said shaft to extend at an angle to the axial center thereof and in a helical feed; screw I5 keyed to and rotatable scraping relation with the surface of said cham with said shaft for gathering the frozen mix ber, each of said blades extending through an and feeding it through the discharge oriñce l0 arc adjacent the surface of said chamber and 'into the spout' 1,3 Il. Within said spout there is also provided a helical »feed screw 38 keyed to and 25 in staggered relation to each other with the com bined arcs through which the staggered blades rotatable wltli‘ said shaft. which -receives and extend co-extensive with the circumference of carries the ñnished product forward for discharge At vthe discharge end of the cylinder and ad jacent the forwardmost of said blades there is from the machine. g , _ . ». said chamber. . 3. A machine for producing an edible frozen In view of the above, it will be notedthat the confection in a continuous operation, including mix is maintained at all times distributed about a cylindrical freezing chamber for continuously the freezing wall of the cylinderin a thin nlm receiving at one end a mix to be frozen and con such that theparticles will freeze upon being tinuously discharging edible frozen confection at thrown» against said freezing surface. vbut which the other end thereof, a shaft rotatably mounted are constantly being scraped or peeled therefrom and moved forwardly from one scraping blade to 35 axially of said chamber, means for rotating said shaft, a series of scraper blades mounted in stag the next while maintained in contact with the gered relation along said shaft to be rotated freezing surface by centrifugal force. Such cen trifugal forceg‘keeps the frozenv particles moving 0f the freezing wall until they are gathered by the, discharge screw 3! and.. fed there by. from the machine., Thus, the mix is so frozen as it emerges~ fromgthe machine that it is im mediately infe'dibie condition and requires no further freezing4v action. . . V’I‘l'ieinvention claimed is: - . _,1. -Aimachlr'ie for producing. edible frozen ,con faction' in_eontinuous operation, including a cylin dricalA freezing -chalutier' for continuouslyv receiv irß at one end a mix to« be frozen and> con-à thereby, said blades extending at an angle to said - shaft and curved to conform to the curvature of said chamber throughout their length, a hopper communicating with one end of said chamber through which material to be mixed is continu ously introduced therein to be simultaneously scraped from and conveyed along the wall of said chamber toward a discharge end thereof. a discharge screw mounted on said shaft adjacent theA discharge end of said chamber and a. dis charge feed screw extending from the end of said shaft for receiving and continuously discharging w- the frozen mix conveyed thereto by said scraper , blades and feed screw. the otherend -thereof, a motor driven shaft tinuously.. u u - 1 edible frozen confection at mounted forrotation of said chamber.V a series of‘ scraper blades mounted radially about - FRANK THOMAS.