Sheet feeding and cutting device
阅读：261发布：2022-12-10
专利汇可以提供Sheet feeding and cutting device专利检索，专利查询，专利分析的服务。并且An improved apparatus for processing web material is advantageously associated with a film magazine of a photocomposer and includes a guide assembly which prevents jamming of web material in the magazine. This guide assembly includes a guide element which is movable between an inactive position disposed to one side of a path of movement of a cutter edge in a shear assembly and an active position disposed in the path of movement of the cutter edge. The guide element is moved from the inactive position to the active position upon movement of the cutter edge through the path of movement of the sheet material. The web material is moved in a step-by-step manner past an exposure window by a pair of feed rollers to expose incremental portions of the web material to an original at the exposure window. To enable the extent of movement of the sheet material to be adjusted, at least one of the feed rollers is made of a resiliently yieldable elastomeric material so that the surface of the feed roller is deformable to greater and lesser extents. To facilitate loading of the web material in the magazine, a loading gate is movable from a closed position blocking access to the feed rollers to an open position.，下面是Sheet feeding and cutting device专利的具体信息内容。
1. An apparatus for processing web material, said apparatus comprising conveyor means for moving the web material along a predetermined path, shear means located along the predetermined path for cutting the web material, said shear means including a cutter edge movable along a shear path to cut the web material, guide means for guiding movement of a leading edge portion of the web material through said shear path after cutting of the web material by said shear means, said guide means including a guide element movable between an inactive position disposed out of the shear path and an active position disposed in the shear path, actuator means for moving said guide element from the inactive position to the active position in response to movement of said cutter edge through the path of movement of the web material, said shear means further includes a stationary cutter edge located immediately adjacent to said shear path for cooperating with said movable cutter edge to cut the web material, and said guide element in the active position extending through said shear path at a location therealong which is intermediate said movable cutter edge and said stationary cutter edge.
2. An apparatus as set forth in claim 1 further including means for moving said cutter edge in one direction through the path of movement of the web material and for thereafter moving said cutter edge through the path of movement of the web material in a direction opposite to said one direction, said actuator means including means for moving said guide element from the active position to the inactive position immediately prior to movement of said cutter edge through the path of movement of the web material in said one direction and for moving said guide element from the inactive position to the active position immediately after movement of said cutter edge through the path of movement of the web material in said opposite direction.
3. Apparatus as set forth in claim 1 wherein said shear means includes an arcuate blade with said cutter edge formed thereon, means supporting said arcuate blade for reciprocating movement along an arcuate shear path, and means for moving said arcuate blade along the arcuate shear path, said actuator means including cam means operatively connected with said guide element for engaging said arcuate blade and moving said guide element from the active position to the inactive position under the influence of forces transmitted from said arcuate blade to said cam means during movement of said arcuate blade along the arcuate shear path.
4. An apparatus as set forth in claim 1 wherein said conveyor means includes a pair of feed rollers defining a nip through which the web material passes, at least one of said feed rollers including a plurality of cylindrical portions which are axially spaced apart by a plurality of grooves and are mounted for rotation about a common axis, said apparatus further including feed roll guide means for guiding the web material relative to said nip, said feed roll guide means including a plurality of guide fingers disposed on one side of the path of sheet travel and extending into the grooves formed in said one of said feed rollers.
5. An apparaTus as set forth in claim 4 wherein said feed roll guide means includes a guide plate interconnecting said guide fingers and extending along the path of movement of the web material into an overlapping relationship with said guide element when said guide element is in the active position to guide the web material from said nip to said shear means.
6. An apparatus as set forth in claim 1 wherein said conveyor means includes first and second feed rollers defining a nip through which the web material passes, each of said feed rollers including a plurality of cylindrical portions which are axially spaced apart by a plurality of grooves and are mounted for rotation about a common axis, said apparatus further including feed roll guide means for guiding movement of the web material to and from said nip, said feed roll guide means including a first guide plate disposed on one side of the path of movement of the sheet material and on an upstream side of said feed rollers, a first plurality of guide fingers extending downstream from said first guide plate and into the grooves formed in said first feed roller, a second guide plate disposed on a side of the path of movement of the sheet material opposite the one side and on a downstream side of said feed rollers, and a second plurality of guide fingers extending upstream from said second guide plate and into the grooves formed in said second feed roller.
7. An apparatus as set forth in claim 6 wherein said cylindrical portions of said first feed roller have outer surfaces formed by a resiliently yieldable elastomeric material which is deformable to greater or lesser extents with variations in pressure applied against the surfaces of said cylindrical portions of said first feed roller at said nip to vary the extent of circumferential pressure engagement between said cylindrical portions of said first feed roller and the web material as the web material passes through said nip, drive means for rotating said feed rollers at a predetermined rotational speed, and control means for adjusting the position of at least one of said feed rollers in a generally radial direction relative to the other of said feed rollers to adjust the pressure applied against the surfaces of said cylindrical portions of said first feed roller and the extent of circumferential pressure engagement between the surface of said first feed roller and the web material.
8. An apparatus as set forth in claim 1 further including a base member and cover member mounted thereon for movement between an open position to allow access to said conveyor means and a closed position for operation of said apparatus, said conveyor means including a pair of feed rolls and mounting means mounting said feed rolls on said base member, at least one of said feed rolls being formed of a resilient elastomeric material, said mounting means including means for moving said rollers between an engaged position for conveying the web material and a disengaged position for loading the web material, cooperating means between said cover member and said rolls for moving said rolls to the engaged position when the cover member is in its closed position and the disengaged position when the cover member is in its open position, and means for varying the distance between the axes of said rolls in their engaged position.
9. An apparatus for processing web material, said apparatus comprising conveyor means for moving the web material along a predetermined path, said conveyor means including first and second feed rollers defining a feed nip through which the web of material passes in pressure engagement with outer surfaces of said feed rollers, said first feed roller having an outer surface formed by a resiliently yieldable elastomeric material which is deformable to greater and lesser extents with variations in the pressure applied against the web material at said feed nip by said first feed roller to vary the extent of circumferential pressure engagement between the surface of said first feed roller And the sheet material, drive means for rotating at least one of said feed rollers at a predetermined rate, and control means for adjusting the speed of movement of the web material through said feed nip during rotation of said one feed roller at the predetermined rate by said drive means, said control means including means for adjusting the position of at least one of said feed rollers in a generally radial direction to the other feed roller to adjust the pressure applied against the surface of said first feed roller and vary the extent of circumferential pressure engagement between said first feed roller and the web of material.
10. An apparatus as set forth in claim 9 further including shear means located along the predetermined path downstream from said feed nip for cutting the web material, said shear means including a cutter edge movable along a shear path to cut the web material, guide means for guiding the web material from said feed nip through said shear path, said guide means including a guide element movable between an inactive position disposed out of the shear path and an active position disposed in the shear path to guide movement of a leading edge portion of the web material through the shear path after cutting of a sheet from the web material by said shear means, and actuator means for moving said guide element from the inactive position to the active position in response to movement of said cutter edge through the path of movement of the web of material.
11. An apparatus as set forth in claim 10 wherein said first feed roller includes a plurality of cylindrical portions which are axially spaced apart by a plurality of grooves and are mounted for rotation about a common axis, said guide means including a plurality of guide fingers disposed on one side of the path of sheet travel and extending into the grooves formed in said first feed roller to guide movement of the web material from said feed nip toward said shear means.
12. An apparatus as set forth in claim 11 wherein said guide means further includes a guide plate interconnecting said guide fingers and extending along the path of movement of the web material into an overlapping relationship with said guide element when said guide element is in the active position.
13. An apparatus for processing web material as set forth in claim 9 further including means supporting said feed rollers for operation between an engaged condition in which said feed rollers are disposed in a pressure relationship with each other at said feed nip and a disengaged condition in which said feed rollers are out of the pressure relationship and are radially spaced apart to open said feed nip, a loading gate movable relative to said conveyor means from a closed position at least partially blocking access to said feed rollers and an open condition providing access to said feed rollers, and actuator means for effecting operation of said feed rollers from their engaged condition to their disengaged condition upon movement of said loading gate from its closed position to its open position to facilitate positioning of the web material relative to said feed rollers and for effecting operation of said feed rollers from their disengaged condition to their engaged condition upon movement of said loading gate from its open position to its closed position to engage the web material with said feed rollers at said feed nip.
14. An apparatus for processing photosensitive sheet material, said apparatus comprising a base, holder means connected with said base for holding a supply web of photosensitive web material, conveyor means for moving the web material along a predetermined path relative to said base, a loading gate operatively connected with said base and movable between a closed position at least partially blocking access to said conveyor means and an open position providing access to said conveyor means, said base including window means defining an exposure window for enabling incremental portions of the web material to be exPosed upon movement of each incremental portion of the web material in turn to a position adjacent to said exposure window with said loading gate in the closed position, intermittently operable drive means connected with said base for advancing the photosensitive web material in a step-by-step manner to move successive incremental portions of the photosensitive web material along the path to a position adjacent the exposure window on successive steps of operation of said drive means, for interrupting movement of the web with an incremental portion of the photosensitive web material adjacent to said exposure window, and for moving a next succeeding incremental portion of the photosensitive web material to a position adjacent the exposure window after exposure of an incremental portion of the photosensitive web material, said drive means including first and second feed rollers defining a feed nip through which the photosensitive web material passes, said feed rollers being operable between an engaged condition in which said feed rollers are disposed in a pressure relationship with each other at said feed nip and a disengaged condition in which said feed rollers are out of the pressure relationship and are radially spaced apart to open said feed nip, and actuator means for effecting operation of said feed rollers from their engaged condition to their disengaged condition upon movement of said loading gate from its closed position to its open position to facilitate positioning of the photosensitive web material relative to said feed rollers and for effecting operation of said feed rollers from their disengaged condition to their engaged condition upon movement of said loading gate from its open position to its closed position to engage the photosensitive web material with said feed rollers at said feed nip with the photosensitive web material in a predetermined relationship with said exposure window.
15. An apparatus as set forth in claim 14 wherein said first feed roller has a surface formed by a resiliently yieldable elastomeric material which is deformable to greater and lesser extents with variations in the pressure applied against the surface of said first feed roller to vary the extent of circumferential pressure engagement between the surface of said first feed roller and the photosensitive web material when said loading gate is in the closed position, and control means for adjusting the extent of movement of the photosensitive web material along the path on each step of said drive means, said control means including means for adjusting the position of at least one of said feed rollers in a generally radial direction relative to the other feed roller to adjust the pressure applied against the surface of said first feed roller and the extent of circumferential pressure engagement between the surface of said first feed roller and the photosensitive web material.
16. An apparatus as set forth in claim 14 further including shear means operatively connected with said base and located along the predetermined path downstream from said feed nip for cutting the photosensitive web material after exposure of the web material to an original at said exposure window, said shear means including a cutter edge movable along a shear path to cut the web material, guide means for guiding the photosensitive web material from said feed nip through said shear path, said guide means including a guide element movable between an inactive position disposed to one side of the shear path and an active position disposed in the shear path to guide movement of a leading edge portion of the photosensitive web material through the shear path after cutting of the photosensitive web material by said shear means, and actuator means for moving said guide element from the inactive position to the active position upon movement of said cutter edge through the path of movement of the photosensitive web material.
17. An apparatus for processing photosensitive web material, said apparatus comprising a base, holdeR means connected with said base for holding a web supply of photosensitive web material, window means defining an exposure window for enabling incremental portions of the web material to be exposed to an original upon movement of each incremental portion of the web material in turn to a position adjacent to said exposure window, intermittently operable drive means connected with said base for advancing the photosensitive web material in a step-by-step manner to move successive incremental portions of the photosensitive web material along the path to a position adjacent the exposure window on successive steps of operation of said drive means, for interrupting movement of the web with an incremental portion of the photosensitive web material adjacent to said exposure window, and for moving a next succeeding incremental portion of the photosensitive web material to a position adjacent the exposure window after exposure of an incremental portion of the photosensitive web material, said drive means including first and second rollers defining a nip through which the photosensitive web material passes in pressure engagement with surfaces of said rollers, said first roller having a surface formed by a resiliently yieldable elastomeric material which is deformable to greater and lesser extents with variations in the pressure applied against the surface of said first roller to vary the extent of circumferential pressure engagement between the surface of said first roller and the photosensitive web material, and control means for adjusting the extent of movement of the photosensitive web material along the path on each step of said drive means, said control means including means for adjusting the position of at least one of said rollers in a generally radial direction relative to the other roller to adjust the pressure applied against the surface of said first roller and the extent of circumferential pressure engagement between the surface of said first roller and the photosensitive web material.
18. An apparatus as set forth in claim 17 further including shear means downstream from said nip for cutting the photosensitive web material, said shear means including a cutter edge movable along a shear path to cut the photosensitive web material, guide means for guiding the photosensitive web material from said nip through said shear path, said guide means including a guide element movable between an inactive position disposed to one side of the shear path and an active position disposed in the shear path to guide movement of a leading edge portion of the photosensitive web material through the shear path after cutting of the web material by said shear means, and actuator means for moving said guide element from the inactive position to the active position after cutting of the photosensitive web material with said shear means.
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