Gate for a tablet discharge of a tablet press and method for actuating a gate

{
  "publication_number": "US11464743B2",
  "country": "US",
  "kind": "B2",
  "title": "Gate for a tablet discharge of a tablet press and method for actuating a gate",
  "abstract": "A tablet press comprises a gate that defines a first switching position that feeds tablets into a first tablet outlet and at least a second switching position that feeds tablets into at least one second tablet outlet. The table press further comprises a control apparatus and a drive apparatus. The drive apparatus is configured to be actuated by the control apparatus to move the gate from a home position defined as one of the first switching position and the at least a second switching position into a target position defined as a switching position that is not the home position. The gate is moved from the home switching position at a speed of movement toward the target position such that the speed of movement of the gate is reduced before the target position is reached.",
  "claims": [
    "1. A tablet press comprising: a gate of a tablet discharge defining a first switching position that feeds tablets into a first tablet outlet and at least a second switching position that feeds tablets into at least one second tablet outlet; at least one discharge channel comprising at least one section that expands along a tablet discharge direction, wherein the at least one section that expands is formed from a termination of an upstream constriction from a wall; a control apparatus configured to emit a switching signal; and a drive apparatus configured to receive the switching signal, wherein the drive apparatus is configured to actuate in response to the switching signal to move the gate from a home position defined as one of the first switching position and the at least a second switching position into a target position defined as a switching position that is not the home position, wherein the control apparatus is configured to control the drive apparatus via the switching signal such that the gate is moved from the home switching position at a speed of movement toward the target position and, wherein the speed of movement of the gate is reduced before the target position is reached, and wherein the control apparatus is configured to control the drive apparatus via the switching signal to accelerate the speed of movement of the gate one or more times after the speed of movement of the gate is reduced.",
    "2. The tablet press according to claim 1, wherein the control apparatus is configured to actuate the drive apparatus to reduce the speed of movement of the gate to stop the gate before reaching the target position, and wherein the speed of movement of the gate is then increased to move the gate into the target position.",
    "3. The table press according to claim 1, wherein the gate comprises at least one gate element pivotably mounted within the at least one discharge channel of the tablet discharge between the home position and the target position.",
    "4. The tablet press according to claim 3, wherein the control apparatus is configured to actuate the drive apparatus to reduce the speed of movement of the gate when there is a distance of more than 10 mm between the at least one gate element and an inner wall of the at least one discharge channel bordering the target position.",
    "5. The tablet press according to claim 4, wherein the at least one expanding section is located upstream from a region swept by the gate element during its pivoting movement.",
    "6. The tablet press according to claim 1, wherein at least one expanding section expands opposing walls of the discharge channel.",
    "7. The tablet press according to claim 1, wherein the expansion of the at least one expanding section has a width of at least 10 mm.",
    "8. The tablet press according to claim 2, wherein the control apparatus is configured to actuate the drive apparatus so that the speed of movement of the gate is reduced before reaching an expanding section or after reaching the expanding section.",
    "9. The tablet press according to claim 1, further comprising a plurality of sensors configured to measure parameters of tablets entering the gate.",
    "10. The tablet press according to claim 9, wherein the measured parameters are transmitted to the control apparatus, and wherein the switching signal is generated in response to impermissible deviations of the measured parameters.",
    "11. A tablet press comprising: a tablet discharge comprising at least one discharge channel; a gate of a tablet discharge defining a first switching position that feeds tablets into a first tablet outlet and at least a second switching position that feeds tablets into at least one second tablet outlet; a control apparatus configured to emit a switching signal; a drive apparatus in communication with the control apparatus and configured to be actuated in response to the switching signal in order to move the gate from a home position defined as one of the first switching position and the at least a second switching position into a target position defined as a switching position that is not the home position; and at least one gate element pivotably mounted within the at least one discharge channel of the tablet discharge between the home position and the target position, wherein the at least one gate element is configured to pivot relative to the at least one discharge channel to sweep a region of the discharge channel, wherein the at least one discharge channel has at least one section that expands in width along a tablet discharge direction and is positioned upstream from at least one region that is swept, wherein the at least one section that expands is formed from a termination of an upstream constriction from a wall, wherein the gate is moved from the home switching position at a speed of movement toward the target position and, wherein the speed of movement of the gate is reduced before the target position is reached."
  ],
  "description_excerpt": "The invention relates to a gate for a tablet discharge of a tablet press, in particular a rotary tablet press, wherein a control apparatus is provided, and wherein a drive apparatus is provided that moves the gate between a first switching position in which tablets are fed to a first tablet outlet, and at least one second switching position in which tablets are fed to at least one second tablet outlet.\n\nThe invention moreover relates to a method for actuating a gate for a tablet discharge of a tablet press, in particular a rotary tablet press, in which the gate is moved between a first switching position in which tablets are fed to a first tablet outlet, and at least one second switching position in which tablets are fed to at least one second tablet outlet.\n\nRotary tablet presses have a plurality of upper and lower punches which are always assigned in pairs to a cavity of a die plate of a rotor of the rotary tablet press. While the rotor is rotating, the cavities are filled with the filling material to be pressed. In at least one pressing apparatus, the upper and lower punches are pressed against each other in the cavities to press the filling material into tablets. After pressing, the tablets are generally ejected out of the cavities by the lower punch and, for example, supplied by a scraper to a tablet discharge. The removed tablets are for example fed to different tablet outlets by using measured values from sensors of the rotary tablet press, for example tablet outlets for good tablets, for bad tablets, or for tablets for a sampling.",
  "cpc": [
    "A61K 9/20",
    "B07C 5/362",
    "B30B 11/005",
    "B30B 11/02",
    "B30B 11/08",
    "B30B 11/14",
    "B30B 15/26",
    "B30B 15/30",
    "B30B 15/304",
    "B30B 15/32",
    "B65G 43/08",
    "B65G 47/766"
  ],
  "ipc": [
    "A61K 9/20",
    "B30B 11/00",
    "B30B 11/02",
    "B30B 15/30",
    "B30B 15/32"
  ],
  "assignees": [
    "Fette Compacting GmbH"
  ],
  "inventors": [
    "Friedrich Meissner",
    "Stefan Luedemann"
  ],
  "filing_date": "2019-07-01",
  "publication_date": "2022-10-11",
  "grant_date": "2022-10-11",
  "priority_date": "2018-07-04",
  "application_number": "US-201916458621-A",
  "family_id": "66912657",
  "cited_by_count": 1,
  "citations": [
    "US4066173A",
    "US4570229A",
    "JPS6271107A",
    "US4643291A",
    "WO2008038070A1",
    "EP1974895A2",
    "EP2368704A2",
    "JP2015145020A",
    "CN106553373A",
    "CN205112500U"
  ]
}