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US3618865A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for milling pasty materials

Assignee: Buehler AG
•
Filing: 1970-05-04
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Granted: 1971-11-09
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Expires: 1990-05-04
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Abstract

Abstract In a method of milling pasty material, such as chocolate, having a tendency to separate out components, between one or more pairs of cooperating friction rollers associated with a pouring trough receiving the material from a supply device which can be blocked from the trough in a controlled manner in dependence on the extent to which the trough is filled with material, both the level of the material in the trough and the flow of the material into the trough are sensed in a coordinated manner and the blocking of the supply device is controlled in accordance with such sensing. The apparatus includes two feeling or sensing levers fixed to oscillate as a unit, these levers being counterbalanced in one direction. When the slide controlling blocking of the supply device is opened, the material moving into the trough engages one of the levers to swing both levers against the bias of the counterweight, moving the other lever into a position where it senses the level of the material in the trough at the nip between two cooperating friction rollers. This provides a control signal resulting in closing of the slide or gate of the supply device. When the level of the material at the nip between the two rollers falls below a predetermined point, the material disengages the other lever and the counterweight swings both levers back to a position where a control means is operated to reopen the slide controlling discharge from the supply device into the trough.

Inventors

  • 👤 Roman Alfred Grundler
  • 👤 Paul Emil Brenner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 19:34
CPC Classifications
B; B02; B02C; B02C4/00; B02C4/02; B02C4/04

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 158 words
In apparatus for milling pasty material and of the type including at least one pair of cooperating friction bodies defining a drawing-in gap, a pouring trough associated with the friction bodies, a supply device for discharging the material into the pouring trough, gate means controlling discharge of the material from the supply device to the pouring trough, and a control device actuating the gate means in dependence on the extent to which the trough is filled with the material: an improved control device comprising, in combination, at least one sensing lever means extending parallel to and above said drawing-in gap; means mounting said sensing lever means for oscillation about a pivot axis; said sensing lever means extending, in said pouring trough, into the region of said drawing-in gap and also into the region of the discharge opening of said supply device; and control elements actuated by said sensing lever means controlling opening and closing of said gate means.
Claim 2
Dependent Claim 66 words
Apparatus for milling pasty material, as claimed in claim 2, in which each sensing lever means comprises two sensing levers secured to a pivot shaft for conjoint oscillation; said two sensing levers including a level sensing lever extending from said shaft into the region of said drawing-in gap, and including a supply sensing lever extending into the region of the discharge opening of said supply device.
Claim 3
Dependent Claim 36 words
Apparatus for milling pasty material, as claImed in claim 3, in which said level sensing lever, in the region of said drawing-in gap, is provided with an elongated plate extending substantially parallel to said drawing-in gap.
Claim 4
Dependent Claim 29 words
Apparatus for milling pasty material, as claimed in claim 3, in which said supply sensing lever has a relatively small edge extension extending substantially parallel to said drawing-in gap.
Claim 5
Dependent Claim 32 words
Apparatus for milling pasty material, as claimed in claim 3, in which the free end of said level feeling lever extends into said pouring trough into the range of said drawing-in gap.
Claim 6
Dependent Claim 32 words
Apparatus for milling pasty material, as claimed in claim 3, in which said supply feeling lever is arranged in that lateral range of said supply device which is near said drawing-in gap.
Claim 7
Dependent Claim 106 words
Apparatus for milling pasty material, as claimed in claim 2, including a shaft forming said pivot axis; each sensing lever means being adjustably secured to said shaft; a pair of laterally spaced structural members of said apparatus oscillatably supporting said shaft and mounting said friction bodies; operating means connected to said gate means to open and close said gate means; an energy supply line connecting said operating means to a supply of operating energy; energy supply switching means incorporated in said energy supply line; and actuating means secured to said shaft and controlling said switching means in accordance with the position of said sensing lever means.
Claim 8
Dependent Claim 38 words
Apparatus for milling pasty material, as claimed in claim 8, in which said energy supply is a source of fluid under pressure; said operating means comprising a piston and cylinder device; said switching means comprising a control valve.
Claim 9
Dependent Claim 83 words
Apparatus for milling pasty material, as claimed in claim 2, in which said apparatus includes control arrangements controlling driving of said friction bodies and controlling the friction gaps between said friction bodies; a switch controlled by movement of said sensing lever means and included in said control arrangement; said switch, when operated by said sensing lever means, operating through said control arrangement to control said friction bodies to a condition in which they are no longer in effective milling cooperation with each other.
Claim 10
Dependent Claim 43 words
Apparatus for milling pasty material, as claimed in claim 10, in which said switch includes contact closing means connected to a piston displaceable in a cylinder; and a fluid pressure medium supply line connecting said cylinder to a source of fluid under pressure.
Claim 11
Dependent Claim 33 words
Apparatus for milling pasty material, as claimed in claim 11, in which said switch is controllable with a time delay through the medium of a throttling section in said pressure medium supply line.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-11-08 1975-05-10 1975-11-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-11-08 1979-05-10 1979-11-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-11-08 1983-05-10 1983-11-09 $7700.00 Window Closed / Lapsed

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