Apparatus for evening a card-produced sliver

Claim 2

In an apparatus in combination with a carding machine and a regulatable tuft feeding device for evening a running sliver produced by the carding machine; including a fiber-handling roller forming part of the carding machine, a motor drivingly connected to said roller, an rpm-setting device connected to said motor, a desired value setter connected with said regulatable tuft feeding device; measuring means for determining momentary values of mass of the running sliver; a regulator connected to the measuring means and to said rpm-setting device for controlling the rpm of said roller as a function of the sliver mass sensed by said measuring means; the improvement comprising a limit value indicating means connected to said rpm-setting device for responding to predetermined setting limits.

Claim 3

An apparatus as defined in claim 1, wherein said limit value indicating device is connected with said desired value setter.

Claim 4

An apparatus as defined in claim 1, wherein said limit value indicating device comprises a voltage comparator.

Claim 5

An apparatus as defined in claim 1, wherein said regulatable tuft feeding device comprises a tuft feeding apparatus operatively connected to an input of said carding machine.

Claim 6

An apparatus as defined in claim 4, wherein said tuft feeding apparatus comprises a tuft chute having a horizontally measured depth and including a wall adjustable for varying said depth; a drive motor connected to the wall for moving said wall and a control device connected to the wall-moving motor.

Claim 7

An apparatus as defined in claim 5, wherein said measuring means for determining momentary values of mass, said rpm-setting device and said control device connected to said wall-moving motor are coupled to a computer means for storing predetermined rpm values for the rpm-setting device for comparing measured actual values with the predetermined rpm values, for generating a setting signal in case a deviation between the predetermined rpm values and the measured actual values exceeds a predetermined limit, and for applying the setting signal to said control device connected to the wall-moving motor.

Claim 8

An apparatus as defined in claim 5, wherein said carding machine includes a feed roller constituting said fiber-handling roller and further wherein said regulatable tuft feeding device is formed by said feed roller; said carding machine including a doffer, a motor drivingly connected to the doffer, an rpm-setting device connected to the doffer motor; further wherein said measuring means for determining momentary values of mass, said rpm-setting device connected to the doffer motor, said rpm-setting device connected to the feed roller and said control device connected to the wall-moving motor are coupled to a computer means for storing predetermined rpm values for the rpm-setting devices and said control device connected to the wall-moving motor, for comparing measured actual values with the predetermined rpm values, for generating a setting signal in case a deviation between the predetermined rpm values and the measured actual values exceeds a predetermined limit, and for applying the setting signal to said rpm-setting device connected with the feed roller motor and said control device connected to the wall-moving motor.

Claim 9

An apparatus as defined in claim 7, wherein said carding machine includes a doffer, a motor drivingly connected to the doffer, an rpm-setting device connected to the doffer motor; further wherein said measuring means for determining momentary values of mass, said rpm-setting device connected to the doffer motor and said rpm-setting device connected to the feed roller are coupled to a computer means for storing predetermined rpm values for the rpm-setting devices, for comparing measured actual values with the predetermined rpm values, for generating a setting signal in case a deviation between the predetermined rpm values and the measured actual values exceeds a predetermined limit, and for applying the setting signal to said rpm-setting device connected with the feed roller motor.

Claim 10

An apparatus as defined in claim 1, wherein said carding machine includes a feed roller constituting said fiber-handling roller and further wherein said regulatable tuft feeding device is formed by said feed roller.