Apparatus for delivering sheets onto a moving strip of material
阅读：696发布：2021-12-15
专利汇可以提供Apparatus for delivering sheets onto a moving strip of material专利检索，专利查询，专利分析的服务。并且This sheet delivery apparatus for use with an intaglio printing press takes sheets from a conventional conveyor running at press speed, and on which the sheets are widely spaced as determined by the press operation, and passes them along a decelerating conveyor to a continuously running strip on which they are deposited in closely spaced relation. The strip and sheets together are then wound into a roll and allowed to stand for a period of time long enough to allow the ink to dry on the sheets. The decelerating conveyor includes perforated conveyor belt means running over a manifold which is connected to a vacuum pump. The pressure difference between the atmosphere and the evacuated manifold holds the sheets lightly on the perforated belt, thereby decelerating the sheets to the speed of the perforated belt, which is running slower than the press speed. At the end of the deceleration belt, the sheets pass on to a moving strip of paraffin coated paper which is being driven at a predetermined ratio with respect to the press speed by means of a continuous belt drive which runs along with the strip for a substantial distance. The tension on this strip is controlled by driving the strip take-up reel with a motor having a limited maximum torque characteristic, driving the strip between the reels at a preselected speed, and braking the strip supply reel with a limited maximum torque brake. The sheets pass from the decelerating belt onto a reach of the strip which is inclined slightly downward and extends to a reel on a double reel stand. The take-up reel position is controlled by the position of the strip so as to maintain that reach of the strip within a small angle of the horizontal throughout the winding process.，下面是Apparatus for delivering sheets onto a moving strip of material专利的具体信息内容。
1. Apparatus for delivering sheets onto a moving strip of material and winding the strip and sheets together in a roll, comprising: a. strip supply means; b. strip and sheet take-up means including a take-up reel rotatable about a horizontal axis and vertically movable means supporting the take-up reel; c. means defining a path for the strip from the strip supply means to the take-up reel, said path defining means including a guide roll over which the strip passes as it approaches the take-up reel; d. means for depositing sheets on the upper surface of the strip; e. motor means for driving said vertically movable means; and f. control means for the motor means including: 1. a sensing device adjacent the moving strip between the guide roll and the take-up reel, said device being actuatable by the strip when the elevation of the strip at the device differs from that of the point of tangency of the strip leaving the guide roll by a predetermined distance; and 2. means responsive to actuation of the device to energize the motor means to drive the movable means in a direction to reduce said distance until the device is no longer actuated by the strip, so that the reach of the strip approaching the reel and carrying the sheets remains at an angle within a predetermined range of the horizontal as the diameter of the roll on the take-up reel increases.
2. means responsive to actuation of the device to energize the motor means to drive the movable means in a direction to reduce said distance until the device is no longer actuated by the strip, so that the reach of the strip approaching the reel and carrying the sheets remains at an angle within a predetermined range of the horizontal as the diameter of the roll on the take-up reel increases.
2. Apparatus as in claim 1, in which: a. the sensing device is actuated when the strip at the device is below said point of tangency; and b. the motor means is deenergized before the strip moves above the elevation at the point of tangency, so that the strip between the point of tangency and the take-up reel is always traveling slightly downward.
2. a roll of strip thereon;
2. means responsive to actuation of the device to energize the motor means to drive the movable means in a direction to reduce said distance until the control device is no longer actuated by the strip, so that the final reach of the strip approaching the reel and carrying the printed sheets remains at an angle within a predetermined range of the horizontal as the diameter of the roll on the take-up reel increases.
2. means, including evacuated manifold means under said belt means, for attracting sheets released from the first conveyor means and holding them on the belt means; d. strip supply means; e. strip and sheet take-up means including a take-up reel and vertically movable means supporting the take-up reel; f. means defining a path for the strip from the strip supply means past the discharge end of the decelerating conveyor means where the sheets are discharged onto the strip, to the take-up reel, said path defining means including a guide roll over which the strip passes as it approaches the take-up reel; g. motor means for driving said upwardly movable means; and h. control means for the motor means including:
2. means, including evacuated manifold means under said belt means, for attracting sheets released from the first conveyor means and holding them on the belt means; d. strip supply means; e. strip and sheet take-up means; and f. means defining a path for the strip from the supply means past the discharge end of the declerating conveyor means to the take-up means, so that the decelerated sheets move onto the strip adjacent said discharge end.
2. means responsive to actuation of the device to energize the motor means to drive the movable means in a direction to reduce said distance uNtil the device is no longer actuated by the strip, so that the final reach of the strip approaching the reel and carrying the printed sheets remains at an angle within a predetermined range of the horizontal as the diameter of the roll on the take-up reel increases.
3. brake means aPplying a substantially contant retarding torque to the supply reel; and
3. Apparatus as in claim 1, including a table supporting the strip between the guide roll and the take-up reel.
4. Apparatus as in claim 2, in which the table is tilted with its edge nearest the take-up reel below its edge nearest the guide roll.
4. strip drive means engaging the strip between the reels for driving the strip at a linear speed having a fixed ratio to the linear speed of the decelerating conveyor means; and b. said strip and sheet take-up means includes limited maximum torque motor means driving the take-up reel.
5. Apparatus as in claim 1, in which said sensing device comprises: a. a lever; b. a roller journaled at one end of the lever and engaging the under side of the strip; and c. a weight on the other end of the lever biasing the roller into engagement with the strip.
6. Apparatus as in claim 5 in which said sensing device further comprises an electric switch operated by said lever and connected in said control means.
7. Apparatus for delivering printed sheets from a press to a strip of material and winding the strip and sheets together in a roll, comprising: a. conveyor means for carrying the sheets from the press to a transfer station; b. strip supply means; c. strip and sheet take-up means including a take-up reel and vertically movable means supporting the take-up reel; d. means defining a path for the strip from the strip supply means past the transfer station to the take-up reel, said path defining means including a guide roll over which the strip passes as it approaches the take-up reel; e. means at the transfer station for transferring sheets from the conveyor means to the upper surface of the strip; f. motor means for driving said vertically movable means; and g. control means for the motor means including:
8. Apparatus for moving printed sheets from a press to a strip of material running at a slower speed than the press and winding the strip and sheets together in a roll, comprising: a. conveyor means running at press speed for carrying the sheets from the press to a transfer station, said conveyor means having spaced grippers for engaging individual sheets and positively advancing them, said conveyor including a reach at the transfer station where the sheets are carried below the conveyor; b. gripper release means at the transfer station for releasing the grippers; and c. decelerating conveyor means below said reach at the transfer station, comprising:
9. Apparatus for moving printed sheets from a press to a strip of material running at a slower speed than the press and winding the strip and sheets together in a roll, comprising: a. conveyor means running at press speed for carrying the sheets from the press to a first transfer station, said conveyor means having spaced grippers for engaging individual sheets and positively advancing them, said conveyor including a reach at the transfer station where the sheets are carried below the conveyor; b. gripper release means at the transfer station for releasing the grippers; and c. decelerating conveyor means below said reach at the transfer station comprising:
10. Apparatus as defined in claim 9, in which: a. said strip supply means includes:
11. Apparatus for delivering sheets onto a moving strip and winding the strip and sheets together into a roll, comprising: a. strip supply means including a supply reel and a roll of strip thereon; b. strip and sheet take-up means including a take-up reel; c. means, including maximum torque limiting means, driving the take-up reel; d. brake means applying a substantially contant retarding torque to the supply reel; e. continuously running sheet supply means for delivering sheets onto said strip at intervals separated in time; f. strip drive means engaging the strip throughout a substantial length thereof between the reels, and g. motion transmitting means connecting said sheet supply means and said strip drive means, said motion transmitting means including means for varying the ratio between the linear speeds of the strip drive means and the sheet supply means.
12. Apparatus as in claim 11, in which the strip drive means includes a rotating drive cylinder over which the strip passes, and clamp means to force the strip against the periphery of the cylinder.
13. Apparatus as in claim 12, in which said clamp means comprises: a. a lever; b. a roller carried at one end of said lever and rotatably engaging said strip on the surface thereof opposite said drive cylinder; and c. fluid motor means engaging another point on said lever and effective to force said roller toward said drive cylinder to tightly clamp the strip between the roller and the cylinder.
14. Apparatus as in claim 11, in which the strip drive means includes: a. a positively driven cylinder over which the strip passes; b. guide rollers defining a tortuous path for the strip, said path extending around more than one-half the circumference of the positively driven cylinder; and c. clamp means to force the strip against the periphery of the cylinder.
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