US3927908A - Pulp sheet gripping tool - Google Patents

Pulp sheet gripping tool Download PDF

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Publication number
US3927908A
US3927908A US542920*A US54292075A US3927908A US 3927908 A US3927908 A US 3927908A US 54292075 A US54292075 A US 54292075A US 3927908 A US3927908 A US 3927908A
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United States
Prior art keywords
clamping jaw
tool
base plate
handle
front portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US542920*A
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English (en)
Inventor
Harry Knelson
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Individual
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Individual
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Filing date
Publication date
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Publication of US3927908A publication Critical patent/US3927908A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J1/00—Manipulators positioned in space by hand
    • B25J1/04—Manipulators positioned in space by hand rigid, e.g. shelf-reachers

Definitions

  • ABSTRACT A tool having a head fitted with a lengthy handle so [30] Foreign Appucafion Priority Dam that a workman can thrust the head deep into a pulp Feb 12 974 Canada 19246] drymg machine from a safe position outside the machine.
  • the head has a base plate which slides along a [52] U 8 Cl 294/19 294/)4 surface supporting a sheet of pulp and a clamping jaw [51] k A 1 13/06 is carried at one end of the base plate.
  • PULP SHEET GRIPPING TOOL My invention relates to a tool which is particularly adapted for use in the pulp and paper industry.
  • the tool is operable by a workman standing in a position of safety outside the dryer and is readily mainpulated to reach in and seize pulp pieces or the like so that they can be drawn out.
  • FIG. 1 is a schematic plan view of a tool constructed in accordance with the present invention in a typical position of use
  • FIG. 2 is an enlarged plan of a head of the tool
  • FIG. 3 is a side elevation of the head showing a clamping jaw of the tool in closed position
  • FIG. 4 is an end elevation of the head with a handle of the tool removed
  • FIG. 5 is a side elevation, part broken away, and showing the clamping jaw in open position
  • FIG. 6 is a fragmentary side elevation, part in section, showing the construction of the tool handle.
  • the numeral [0 indicates generally a tool which is shown being used to grip an edge of a sheet of pulp 11.
  • a horizontal screen of a pulp drying machine is represented by the numeral 12 and normally the sheet 11 travels along this horizontal surface in the direction of arrow 14. Occasionally the sheet II will break and it then becomes necessary to shut down the drying machine so as to halt forward progress of the pulp sheet until such time that brokenoff sections of the pulp can be cleared away from the path of travel of the sheet proper.
  • the tool comprises a head which is fitted with a handle 2!.
  • the head 20 will be seen to comprise a base plate 24 having a rear edge 25, a horizontally curved front edge 26, and parallel side edges 27. Near the front edge 26, the plate 24 slopes downwardly to provide a portion 30 and this front portion has a top bevel 31 near said front edge.
  • Plate 24 is mounted on transversely spaced runners 34 of wood or other suitable material which runners extend beneath the side edges 27 from the rear edge to a point near the curved front edge 26.
  • screws 35 which can be seen in FIG. 2 are used to secure the runners 34 to the underside of the base plate.
  • Jaw 40 Mounted on the base plate 24, above the front portion 30, is a clamping jaw 40, see FIGS. 2, 3 and 5.
  • Jaw 40 has a rear edge 41, a horizontally curved front edge 42, a top bevel 43 near this front edge, and parallel side edges 44 which are vertically aligned with the corresponding edges of the front portion 30.
  • Extending into the clamping jaw 40 from the rear edge 4] to a point about mid-length of said jaw is a rectangular slot 46.
  • the clamping jaw 40 is hingedly connected to the base plate 24 by means generally indicated at 50.
  • the hinged means 50 comprises a pair of transversely spaced bearings 52 which are provided on the top surface of the base plate 24 near the portion 30.
  • the rear edge 41 of the clamping jaw 40 has rearwardly projecting bearings 53 which straddle the bearings 52 and a hinge shaft 54 extends through these four transversely aligned bearings.
  • the transverse hinge shaft 54 is secured against withdrawal from the bearings by a nut 56 secured to each laterally projecting and threaded end of the shaft.
  • the clamping jaw 40 can swing between a closed position (FIG. 3) and an open position (FIG. 5) with respect to the front portion 30 of the base plate.
  • the clamping jaw of the tool 10 is adapted to be opened and closed partly through the medium of linkage means generally indicated at 60.
  • the means 60 is best shown to comprise an upstanding lever 62 which is rockingly mounted on the hinge shaft 54.
  • the jaw 40 is provided with a pair of bearing blocks 63 which are mounted on the top surface of this jaw alongside the side edges of the slot 46 and near the blind or front end thereof.
  • Links 64 and 65 as well as pivot pins 66, 67 and 68 interconnect the lever 62 and the blocks 63.
  • the double links 64 and 65 are disposed within the slot 46 and the pin 67 which interconnects these two links is fitted with a roller 70 which, at times, rides on the top surface of the front portion 30 to provide a smooth opening and closing movement of the clamping jaw 40.
  • the jaw 40 normally is held shut by resilient means generally indicated at 75, see FIGS. 2 to 5.
  • Means comprises a pair of bell cranks 77 which are pivotally mounted one on each projecting end of the hinge shaft 54, the lever being held in position by a nut 56.
  • Each lever 77 has an upper arm 77A which projects forwardly alongisde the side edge 44 of the clamping jaw and the front end of this arm is secured by a bolt 78 to said clamping jaw.
  • the downwardly projecting leg 77B of each lever is notched as at 79 to receive one end of a spring 80 with the opposite end of said spring being anchored to a side edge 27 of the base plate by means of a bolt 82.
  • the resilient means 75 biases the clamping jaw 40 towards the closed position shown best in FIG. 3.
  • the jaw 40 is swung about the hinge means 50 so that the lever 62 assumes the position shown in FIG. 5 where a lower edge thereof is resting on the portion 30.
  • the roller 70 bears on the top surface of the portion 30 and the pin 67 is vertically aligned with or is slightly ahead of the pin 68.
  • Springs 80 now are exerting pressure to hold the linkage in this position whereupon the jaw 40 cannot close unless the lever 62 is rocked towards the rear of the tool head.
  • This rocking of the lever 62 to allow the jaw 40 to snap shut under the influence of the resilient means 75 is accomplished by means of a length of cord 84.
  • One end of this flexible member is secured as at to the lever 62, the point of attachment being a corner of a triangle formed with the shaft 54 and pin 66.
  • the cord is trained through an eye 86 secured to the top of the base plate 24 and extends alongside the handle 21 to the outer end thereof.
  • the handle 21 is made up of a number of standard sections 21A, see FIG. 6. One end ofeach section 21A has a threaded rod 90 while the opposite end of said section is provided with an internally threaded bore 91 to receive the rod of an adjoining section.
  • a suitable number of the sections can be interconnected to form a handle 21 of the required length depending on how far the head 20 has to be thrust into the pulp drying machine.
  • the tool is provided with mounting means gener ally indicated at 94 for releasably securing one end of the handle 21 to the base plate 24.
  • Means 94 comprises a tubular socket 95 secured to the top surface of the plate 24 near the rear edge 25.
  • the sleevelike socket 95 has a longitudinal slot 96 which extends forwardly from open rear end 97 of said socket to connect with a transverse recess 98.
  • a section 21B of the handle is fitted with a ferrule 100 which carries a laterally projecting pin 101. When the ferrule 100 is slipped into the socket 95, the pin 100 travels along the slot 96 whereupon a partial turn of the handle will lodge the pin in the recess 97 thereby locking the head to the handle 21.
  • the portion 30 and jaw 40 will be seen to have opposing faces 104 and 105 respectively between which the pulp sheet 11 is adapted to be clamped.
  • Jaw 40 is provided with a plurality of suitably spaced teeth 106 which project below the face 105.
  • the face 104 of the base plate portion 30 has recesses 107 to receive the tips of the teeth 106 when the clamping jaw is closed.
  • the handle 21 made up of a number of sections 21A to the required length is secured to the head 20 by the mounting means 94 and the jaw 40 is opened by hand before the tool 10 is thrust into the dryer.
  • the cord 84 is played out so that one end thereof is accessible alongside the outer end of the handle.
  • the workman manipulates the tool 10 to enter the portion 30 beneath the edge of the broken-off section of pulp he wishes to grip and then tugs on the cord 84.
  • the teeth 106 project through the pulp and ensure a firm grip on the section of pulp which can then be pulled out of the dryer by means of the tool.
  • each tool is manned by a workman and a concerted pull by the group will draw an edge of a large pulp sheet into the required position.
  • a tool for gripping an edge of a remote piece of sheet material comprising a base plate, a handle secured to the base plate and extending rearwardly thereof, said base plate having a front portion enterable beneath an edge of the sheet material, a clamping jaw adjacent the front portion, hinge means securing the clamping jaw to the base plate for swinging movement between an open and a closed position with respect to the front portion, resilient means biasing the clamping jaw towards the closed position, linkage means including an upstanding lever pivotally connecting the clamping jaw to the base plate and adapted to support said 4 jaw in the open position against pressure applied by the resilient means, a trip member secured at one end to the upstanding lever and extending rearwardly of the base plate substantially parallel to the handle.
  • a tool as claimed in claim 1 and including mounting means releasably securing one end of the handle to the base plate.
  • said mounting means comprises a tubular socket having a longitudinal slot terminating in a transverse recess, and said handle having an end enterable into the tubular socket with a laterally projecting pin on said end movable through the longitudinal slot into the transverse recess.
  • said linkage means comprises a first link pivotally connected at one end to the clamping jaw and projecting through a slot formed in said clamping jaw, said upstanding lever being rockable about a transverse axis provided by the hinge means, a second link pivotally connecting the upstanding lever to the other end of the first link, and a roller carried by the connected ends of the first and second links adapted to ride on the front portion as the clamping jaw swings between open and closed position.

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  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
US542920*A 1974-02-12 1975-01-22 Pulp sheet gripping tool Expired - Lifetime US3927908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA192,461A CA990759A (en) 1974-02-12 1974-02-12 Pulp sheet gripping tool

Publications (1)

Publication Number Publication Date
US3927908A true US3927908A (en) 1975-12-23

Family

ID=4099185

Family Applications (1)

Application Number Title Priority Date Filing Date
US542920*A Expired - Lifetime US3927908A (en) 1974-02-12 1975-01-22 Pulp sheet gripping tool

Country Status (3)

Country Link
US (1) US3927908A (https=)
CA (1) CA990759A (https=)
SE (1) SE7501423L (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192539A (en) * 1978-07-28 1980-03-11 Broyles Marshall W Stand-up trash retrieving and dumping device
US5853208A (en) * 1996-06-04 1998-12-29 Tda Buddy, Inc. Manual manipulator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217071A (en) * 1977-10-20 1980-08-12 General Foods Corporation Slip sheet repositioning apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US458614A (en) * 1891-09-01 Gripping device
US576179A (en) * 1897-02-02 John wood
US582293A (en) * 1897-05-11 Henry koester
US897163A (en) * 1908-03-27 1908-08-25 Thomas T Shaw Grappling-tongs.
US1021790A (en) * 1911-02-11 1912-04-02 William H Newville Tongs.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US458614A (en) * 1891-09-01 Gripping device
US576179A (en) * 1897-02-02 John wood
US582293A (en) * 1897-05-11 Henry koester
US897163A (en) * 1908-03-27 1908-08-25 Thomas T Shaw Grappling-tongs.
US1021790A (en) * 1911-02-11 1912-04-02 William H Newville Tongs.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192539A (en) * 1978-07-28 1980-03-11 Broyles Marshall W Stand-up trash retrieving and dumping device
US5853208A (en) * 1996-06-04 1998-12-29 Tda Buddy, Inc. Manual manipulator

Also Published As

Publication number Publication date
CA990759A (en) 1976-06-08
SE7501423L (https=) 1975-08-13

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