US3812584A - Safety guard for a cloth cutting machine - Google Patents

Safety guard for a cloth cutting machine Download PDF

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Publication number
US3812584A
US3812584A US00291361A US29136172A US3812584A US 3812584 A US3812584 A US 3812584A US 00291361 A US00291361 A US 00291361A US 29136172 A US29136172 A US 29136172A US 3812584 A US3812584 A US 3812584A
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United States
Prior art keywords
section
machine
primary section
blade
safety guard
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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US00291361A
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English (en)
Inventor
J Peter
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Wolf Machine Co
Original Assignee
Wolf Machine Co
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Filing date
Publication date
Priority to US414971A priority Critical patent/US2347877A/en
Application filed by Wolf Machine Co filed Critical Wolf Machine Co
Priority to US00291361A priority patent/US3812584A/en
Priority to IT48918/73A priority patent/IT979923B/it
Priority to JP48036160A priority patent/JPS4970286A/ja
Priority to GB1976973A priority patent/GB1435991A/en
Priority to GB5334375A priority patent/GB1435992A/en
Priority to DE19732347877 priority patent/DE2347877A1/de
Application granted granted Critical
Publication of US3812584A publication Critical patent/US3812584A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22—Safety devices specially adapted for cutting machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • B26F1/3826—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work using a rotary circular cutting member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7734—With guard for tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/872—With guard means
    • Y10T83/8722—Static
    • Y10T83/8723—Adjustable

Definitions

  • ABSTRACT A novel safety guard for a cloth cutting machine of the vertically oriented, circular blade type.
  • the safety guard When in the closed position, the safety guard includes a fixed section that protects a portion of the blades exposed periphery and a movable primary section that substantially protects the rest of the bladcs exposed periphery.
  • a trigger mechanism is fixed adjacent the machinehandle, the trigger permitting an operator to move the primary section between closed and open positions as he grips the handle when using the cloth cutting machine.
  • the trigger mechanism is spring loaded so that the primary section is continuously biased toward the closed position, thereby causing an operator to be consciously aware of opening the safety guard when readying the machine for cutting and causing the primary section to close automatically if the trigger is released.
  • the movable primary section of the safety guard defines a notch which, when the primary section is in the closed position, allows a blade sharpener device to engage the circular blades periphery for sharpening the blade.
  • An axuiliary section of the safety guard is fixed to the sharpener device, that auxiliary section overlying the notch in the primary section when the sharpener device is retracted and when the primary section is closed.
  • the circular blade can be ground only when its periphery is completely protected because the notch is the primary section only registers with the sharpener device when that primary section is closed.
  • the entire safety guard is structured so that same can be removed from the cloth cutting machine as a single unit simply by unscrewing one thumb screw. This allows simple and easy change of the circular cutting blade when required.
  • One basic type of cloth cutting machine is that which makes use of a circular blade which rotates at high speeds, the circular blade being oriented in a vertical plane.
  • the circular blade is driven by a motor fixed to the machine.
  • the blade and motor are carried on a standard, the standard including a relatively flat base adapted (such as by needle rollers or the like) to roll over a cloth cutting table.
  • Suitable handles are provided on a machine for gripping by an operator, these handles allowing manual guidance of the cloth cutting machine as it is pushed along the cloth cutting table.
  • this known type of vertically oriented, circular blade cloth cutting machine is adapted to cut all types of fabrics.
  • the fabric is laid up or piled into a stack of multiple layers.
  • Such a stack of cloth may be, e.g., 3 to 5 inches in thickness.
  • a pattern outline is traced on the top fabric lay, that outline being, e.g., of a raincoat panel or a suit coat panel or a pants leg panel or the like.
  • the cloth stack i.e., the multiple fabric layers, is then cut by means of the cloth cutting machine, the vertically oriented circular blade being guided along the pattern defined on the top fabric layer as the machine is manually pushed through the cloth stack.
  • Such a vertically oriented, circular blade cloth cutting machine is usually provided with a sharpener device adapted to reciprocate into and out of sharpening engagement with the blades periphery.
  • a sharpener device allows sharpening of the blade when desired by the operator by moving the device into contact with the blades cutting edge while the blade is rotating. When the machine is being used by the operator to cut cloth, the sharpener device is retracted out of engagement with the blades cutting edge.
  • the front segment of the circular blade that is presented into cutting contact with the cloth stack as the machine is manually pushed through the stack.
  • the large, exposed front segment of the circular blade may well provide potential safety hazards to the operator of the machine especially when the machine is disengaged from a cutting attitude with the cloth stack. That is, a cloth cutting machine of the circular blade type presently known to the art may well provide potential safety hazards to the operator, and especially to a new or unskilled operator, since a relatively large segment of the blades periphery is exposed at all times. This because a large frontal segment of the blades periphery is exposed not only during cutting of the cloth, but also during sharpening of the blade as well as when the machine is not in cutting use. Such potential safety hazards are present, of course, even when the machine is being used by the most skilled operator with a great deal of care in the correct operational manner.
  • a typical example of such a potential safety hazard that may arise occurs when the machine's operator must reassemble the stack of cloth which he is cutting. Such might be required because of ripples induced into the stack from the cutting operation, or because of a sharp corner cut that is required, or otherwise.
  • the operator may withdraw the cloth cutting machine from engagement with the cloth stack and may push it off to the side on the cutting table.
  • the operator may choose not to turn off the machine after it has been withdrawn from the cloth stack (by not turning off the machine a couple of seconds warm-up time is saved when use of the machine is required again) while he corrects the flaws in or rearranges the cloth stack.
  • the operator may well absentmindedly reach back for the machines handle. Since the machine rolls on needle rollers, the machine may have oriented itself to a different position during the time it was unattended, thereby presenting the rapidly turning and quite sharp circular saw blade to the operators hands instead of the handle. This for the reason, of course, that the machines handle was no longer in the position where the operator believed it to be. Thus, if the operator does not look where he is putting his hand when reaching for the machines handle, quite obviously his hand may be severely cut if it contacts the machines circular blade.
  • the safety guard When in the closed position, the safety guard includes a fixed section that protects a portion of the bladess exposed periphery and a movable primary section that substantially protects the rest of the blades exposed periphery.
  • a trigger mechanism is fixed adjacent the machines handle, the trigger mechanism permitting an operator to move the primary section between closed and open positions as he grips the handle when using the cloth cutting machine.
  • An adjustment is provided with the trigger mechanism to regulate the mouth opening of the primary section in relation to the height of the cloth stack to be cut.
  • the trigger mechanism is spring loaded so that the primary section is continuously biased toward the closed position, thereby causing an operator to be consciously aware of opening the safety guard when readying the machine for cutting and causing the primary section to close automatically if the trigger is released.
  • the movable primary section of the safety guard defines a notch which, when the primary section is in the closed position, allows a blade sharpener device to engage the circular blades periphery for sharpening the blade.
  • An auxiliary section of the safety guard is fixed to the sharpener device, that auxiliary section overlying the notch in the primary section when the sharpener device is retracted and when the primary section is closed.
  • the circular blade can be ground only when its periphery is completely protected because the notch in the primary section only registers with the sharpener device when that primary section is closed.
  • the entire safety guard is structured so that same can be removed from the cloth cutting machine as a single unit simply by unscrewing one thumb screw. This allows simple and easy change of the circular cutting blade when required.
  • FIG. I is a perspective exploded view illustrating the structural components of the safety guard for acloth cutting machine of this invention.
  • FIG. 2 is a side elevational view illustrating the safety guard in the fully closed position, the sharpener device being retracted;
  • FIG. 3 is a view similar to FIG. 2 illustrating the safety guard in the fully opened or cloth cutting position, the sharpener device being retracted;
  • FIG. 4 is a side elevational view similar to FIGS. 2 and 3 illustrating the safety guard in the fully closed position with the sharpener device engaged in sharpening contact on the saw blades circular periphery.
  • FIG. 1 A cloth cutting machine 10 of the vertically oriented, circular blade 11 type is particularly illustrated in FIG. 1.
  • the cloth cutting machine 10 includes a base 12 having tapered or canted side edges 13, those side edges (particularly at the nose portion 14) allowing the base to easily slide under a cloth stack 15 of multiple fabric layers 16 for cutting purposes, see FIGS. 2-4.
  • the base 12 carries a plurality of needle rollers 17 that allows the machine 10 to roll easily over the surface of a cutting table 18 on which the cloth stack 15 is located.
  • the cloth cutting machine 10 as noted, includes the circular saw blade 11 that is oriented in a vertical plane, that plane more or less bisecting the nose portion 14 of the base 12.
  • the circular blade 11 is supported on a standard 19 that is cast integral with the base 12.
  • the blade 11 is-rotatably fixed to the standard such thatit is partially enclosed at a bottom segment 20 by being received in the bases groove 21.
  • the standard 19 mounts a primary handle 22 that extends rearwardly of the base 12 in a substantially horizontal direction.
  • a motor drive mechanism 23 is mounted to the top of the standard 19 and .is interconnected by a drive gear train (not shown) with the circular blade 11, that mechanism 23 providing motive means by which the circular blade 11 is rotated at relatively highrpms for cutting the cloth fabric.
  • a secondary handle 24 is mounted at the forehead of the motor drive means 23, thereby providing a handle 22, 24 for each of an operators hands so that the circular blade 11 can be adequately guided along a pattern (not shown) drawn on the top fabric layer 16a of the cloth stack 15. That is, the handles 22, 24 provide means for an operator to grip, and to orient as desired, the machine 10 when cutting a cloth stack-15.
  • the cloth cutting machine 10 is gripped by handle 22 with one hand, and by handle 24 with the other hand, by an operator while the blade 11 is rotating rapidly as driven by motor drive means 23.
  • the operator guides the cloth cutting machine 10 about the pattern (not shown) on the top fabric layer 16a of the cloth stack 15 while rolling the machine (on rollers 17) across cutting table 18.
  • the machine 10 will traverse a travel path 25 to engage and cut the cloth stack 15.
  • a sharpener device 26 which includes circular sharpening stones 27 facing one another in mirror relation so as to define a groove 28 therebetween, is fixed in pivotal relation about axis 29 to the machines standard 19.
  • the sharpener device 26 is mounted so that the groove 28 is in'the same vertical plane as blade 11.
  • the sharpener device 26' is continually biased toward its home or nonsharpening position (shown in FIG. 1) by spring means, not shown.
  • an operator depresses the sharpener device 24 by pushing downward on thumb stud 30, thereby pivoting the device about axis 29 so as to locate the blades peripheral edge 31 in grinding contact with the sharpening stones 27 within groove 28.
  • the sharpener device 26 sharpens the blades peripheral edge 31; the sharpening position of the sharpener device 26 is shown in FIG. 4. After sufficient sharpening time has elasped, the sharpener device 26 is simply allowed to return to home position by releasing the thumb stud 30. Of course, the machine is preferably disengaged from cutting contact with the cloth stack while the blade 11 is being sharpened.
  • the circular blade 11 may be thought of as a face of a clock.
  • the motor drive means 23 is fixed to the standard 19, and extends radially upward therefrom, at about the 1 oclock position.
  • the main handle 22 extends rearwardly of the circular blade 11 in a substantially horizontal attitude from about the 1 oclock position.
  • the sharpening stones 27 are pivotally fixed to the standard 19 in a manner that allows same to pivot into and out of contact with the circular blade 11 at about the 10:30 o'clock position.
  • Safety Guard Structure The various structural elements'ofthe safety guard 32 of this invention are illustrated in perspective and exploded view in FIG. 1.
  • the assembled safety guard 32 of this invention is illustrated in FIGS. 2-4, those three Figures illustrating three different operational attitudes of the guard components as will be explained in detail below.
  • the safety guard 32 of this invention includes a fixed section 33 adapted to cooperate with the machines standard 19.
  • the fixed section 33 includes a foot 34 adapted to be received in a close tolerance fit within well 34a defined in the machines base; the foot 34 is located within the well 34a by a locator pin 34b fixed to the base that cooperates with a hole 340 defined in the foot.
  • the fixed section 33 is also adapted to be bolted by a thumb screw 35 or the like to standard 19 in threaded hole 36.
  • the fixed section 33 totally encloses the rear segment of the circular blade 11 when in mounted relation with the standard 19 so that an operators hand cannot engage the rear segment of the blade (as measured clockwise from about the 12 o'clock position through the 3 oclock position to the 6 oclock position).
  • the machines standard 19 may be similar in configuration on the other side of the circular blade 11 to the fixed section 33 on that side of the circular blade visible in the Figures.
  • the safety guard 32 also includes a movable primary section 38 mounted for pivotal movement to the fixed section 33 the fixed seetions hole 40'being aligned with the primary sections hole 39 when the two sections are assembled.
  • the pivot point 42 of the two sections 31, 32 is substantially the same as the blades rotational axis 43.
  • the primary section 38 presents an outer periphery 41 of a length such that, when same cooperates with the fixed section 33, and when same is closed, substantially the entire peripheral edge 31 of the circular blade 11 is protected against inadvertent contact by an operator see FIG. 2.
  • the front segment of the circular blade 11 (the segment from about the 6 oclock position through the 9 oclock position to the 12 oclock position) is protected by the primary section 38 while the rear segment (from about the 12 oclock position through the 3 oclock position to the 6 oclock position) is protected by the fixed section 33; in the machine 10 embodiment shown, the blade 11' is received to a limited extent in the base s groove 21 and, thus, the base 12 actually covers the bottom segment of the blades peripheral edge 31 from about the 5 oclock to the 7 oclock position.
  • the primary section 38 protects the front segment of the blades peripheral edge 31 by means of a lip 44 fixed to main plate 45, see FIG. 1. That is, the movable primary section 38 does not totally enclose the blades peripheral edge 31, but provides an overlapping flange or lip 44 of sufficient width so that contact of an operators hand in an accidental manner with that'front segment of the blade 11 is substantially impossible.
  • the lip 44 only extends from the leading end 47 of notch 46 to pointer 48, Le, only is provided for arcuate segment 50 of the section 38.
  • the notch 46 is cutout of the periphery of the primary section 38, the function of this notch being explained in detail below.
  • That arcuate segment 49 of the primary section 38 which extends from the trailing end 52 of notch to trailing edge 53 of the main plate 45 does not have a lip or flange similar to lip 44. This for the reason that segment 49 of the main plate 45 retracts clockwise over fixed section 33 when being opened, and the presence of a lip would hinder such retracting movement because it would tend to engage the standard 19.
  • the primary section 38 is provided with pointer 48 at its lower end adjacent leading edge 54 of the section 38.
  • the tip 55 of the pointer 48 is in the same vertical plane as the circular blade 11 itself.
  • the trailing edge 53 of the primary section 38 mounts a stop arm 56 adapted to function as an overrun stop as explained in detail below.
  • a trigger mechanism 58 is provided to move the primary section 38 of the safety guard 31 between a closed position where no fabric cutting is possible (see FIG. 2) and an open position where a cloth stack 15 may be cut (see FIG. 3).
  • the trigger mechanism includes trigger 62 which is pivotally connected to the fixed section 38 (at hole 63) by pin 64.
  • the trigger mechanism 58 also includes a motion link 59 pivotally mounted at end 60 to the primary section 38, and pivotally mounted at the other end 61 to the trigger 62. Note that the trigger 62 is pivoted to the fixed section 33 closely adjacent the machines handle 22, thereby allowing an operators hand to easily operate the trigger with the index finger while grasping the handle.
  • the motion link 59 at its end 60 is connected to the primary section 38 in the 9-12 oclock quadrant when the safety guard 32 is closed, i.e., the connection point 65 of the motion link 59 with the primary section 38 is above the pivot point 42 of the primary section 38 and fixed section 33.
  • the pivot point 66 connection of end 61 ofmotion link 59 is located on the trigger 62 below the triggers pivot connection point 64 to the fixed section 38, and such that the axis 67 of the motion link is always on the same side of the guards pivot point 42 at the trigger, i.e., such that the motion links axis 67 never crosses the pivot point 42.
  • a mouth opening M adjustment in the form of a set screw 74 is interconnected with the trigger 62.
  • the set screw 74 has an abutment end 75 adapted to contact the underside of the handle 22, and is received in slip fit relation with shoulders 76 integral with the trigger 62.
  • Collar 77 is in threaded engagement with the set screw 74, and is rotatable relative to the shoulders 76 by hand. Rotation of collar 77 moves the set screws abutment end 75 toward or away from the trigger 62 depending on the direction of rotation.
  • the trigger mechanism 58 also includes spring 69 which is fixed at one end 70 to ear 71 (mounted on the trigger 62 at pivot point 66) and at the other end 72 to the fixed section 33 in hole 73.
  • the spring 69 is a tension spring. and continually urges the trigger 62 clockwise as illustrated in the FIGS. 2-4. This clockwise urging of the trigger 62 is translated into counterclockwise urging of the primary section 38 (through the motion link 59), thereby continuously biasing the primary section toward the closed position (shown in FIG. 2) at which the front segment of the circular blade 11 is protected.
  • the trigger 62 In use, and when it is desired to open the primary section 38 so as to define the mouth M which will make the circular blade 11 accessible to the cloth stack 15, the trigger 62 is pulled upwardly adjacent the handle 22 by the operator, compare FIGS. 2 and 3.
  • the width of mouth M, Le the opening defined by the retraction of the primary section 38, is limited by the setting on set screw 74. Because the trigger 62 is substantially aligned with the handle 22 and closely adjacent thereto, the index finger on that hand which the operator uses to guide the machine by means of grasping handle 22 may be used to pull the trigger up close to the handle as shown in FIG. 3.
  • the trigger 62 By drawing the trigger 62 up close to the handle 22, and because motion link 59 is connected with the primary section 38, such counterclockwise motion of the trigger induces clockwise motion of the primary section so as to partially open the safety guard 32 and make that forward segment of the blades peripheral edge 31 adjacent the machines base 12 acces commenced (as shown in FIG. 3), the trigger 62 may be released as the primary section 38 will be retained in the open mouth M attitude because of upturned pointer 48 riding on the top layer 16a of the cloth stack.
  • the operator When cutting of the cloth stack 15 is finished, the operator simply releases the trigger 62.
  • the primary sec tion 38 then returns from open position (FIG. 3) to closed position (FIG. 2) because of the spring 69 loading of the trigger mechanism 58. Even if the spring 69 is broken or otherwise useless, the primary section 38 will still return to the closed position because it is weightedsuchas to cause it to move counterclockwise from the open position due to gravity.
  • the stop arm 56 on the primary section 38 prevents that section from retracting or' rotating too far counterclockwise. That is, it may be possible under certain structural conditions, and particularly in case the set screw 74 is totally disengaged from operative combination with the trigger 62, for the trigger mechanism 58 to retract the primary section 38 counterclockwise to an attitude that would either overstress the tension spring 69 or cause the section 38 to go over center. In either situation, the primary section 38 may then not return automatically to the closed position once the trigger 62 is released.
  • the top arm 56 on the primary section 38 prevents either occurrence from happening because it is adapted to contact the upper edge 84 of the motion link 59 before the tension spring 69 becomes overstressed and before the primary section passes to that over center position.
  • the primary section 38 is weighted such that it will fall into the closed position from a fully open position (not shown) where the stop arm 56 abuts the motion link 59 once the trigger 62 is released.
  • the primary section38 is failsafe, i.e., the safety guard 32 of this invention is failsafe, because the guard is normally spring loaded closed by tension spring 69 cooperating with trigger 62 and motion link 59.
  • the weight and configuration of the primary section 38 is designed such that the primary section will always fall into the closed position when the trigger 62 is released. This for the reason that the primary section-38 can never be retracted counterclockwise to, a point beyond that attitude where stop arm 56 contacts the top edge 84 of motion link 59, and even in this most retracted counterclockwise attitude the weight of the primary section is such that same falls back into the closed position due to gravity when the trigger is released.
  • the primary section 38 is provided with a notch 46 in its outer periphery.
  • This notch 46 when the primary section 38 is in the closed position shown in FIG. 2, exposes a segment 8601' the circular blades peripheral edge 31 to the sharpening stones 27 f the sharpener device 26. That is, when the primary section 38 is closed the sharpener device 26 is adapted to pivot about pin 29 into sharpening contact with the circular blades periphery, compare FIGS. 2 and 4. Of course, the circular blade 11 is rotating when such sharpening contact is made. Note that because of lip 44 it is not possible to pivot the sharpener device 26 into sharpening contact with the blade 11 when the primary section 38 is retracted or opened because notch 46 will have been moved out of registry with the pivot path of the sharpening stones 27.
  • the fixed section 33 is configured so that when the primary section 38 is retracted the notch 46 will overlie general area 80 on the fixed section 33 so that the blade 11 is not exposed through the notch.
  • the auxiliary section 37 of the safety guard 32 is fixed to the sharpener device 26, the auxiliary section being in the nature of a heel 81 fixed to the mounting structure 78 for the stones 27 by screws 79.
  • the heel 81 of the auxiliary section 37 when the sharpener device 26 is retracted out of a sharpening attitude with the blade 11, is adapted to overlie or cover the notch 46 cut in the primary section 38 see FIG. 2.
  • This covering of the notch 46 by the auxiliary section 37 closes the peripheral edge 31 of the circular blade 11 to accidental contact even though the notch formed in the primary section 38 might allow such contact if it were not for the auxiliary section.
  • the auxiliary section 37 overlies, i.e., is located outside of, the primary section 38.
  • the auxiliary section 37 is sized to overlap the notchs periphery when the safety guard 32 is closed as shown in FIG. 2.
  • the auxiliary section 37 does not totally enclose the circular blade 11; it simply protects against inadvertent accidental finger contact therewith since the heel portion 81 is planar and does not include a lip or flange. It would, ofcourse, be possible to fix another auxiliary section on the other side of the sharpener device 26 if such should prove desirable, so as to more or less enclose the notch 46 defined in the primary section 38.
  • the auxiliary section 37 because it is fixed to the sharpener device 26, is moved relative to the primary section 38 when the sharpening stones 27 are moved into sharpening engagement with the outer peripheral edge 31 of the circular blade 11, compare FIG. 2 and FIG. 4. That is, because the auxiliary section 37 is fixed to the sharpener device 26, and because the auxiliary section overlies the primary section 38, the auxiliary section moves from that attitude shown in FIG. 2 to that attitude shown in FIG. 4 when the sharpening stones 27 are pivoted into sharpening contact with the circular blade 11 by an operator.
  • the auxiliary section 37/primary section 38 structure of the safety guard 32 allows the circular blade 11 to be ground, i.e., to be sharpened, only when the blade is completely enclosed by the safety guard. That is, sharpening of the circular blade 11 can. only occur when the primary section 38 is in'the closed position shown in FIG. 2.
  • the safety guard 32 must be fully closed (where the notch 46 in the primary section 38 is closed by the auxiliary section 37) before grinding of the blade 11 can occur through use of the sharpening stones 27. It is not possible to sharpen the circular blade 11, when the primary section 38 is open or retracted because when the primary section is in that attitude the notch 46 is not in registry with the sharpener device 26. Thus, the operator is forced to see that the primary section 38 is closed before sharpening the circular blade.
  • a modular safety guard for a cloth cutting machine of the vertically oriented, circular blade type said machine including a base and a standard fixed to said base, said standard having said blade mounted thereon in a vertical plane, said safety guard comprising a fixed section removably mounted to the standard of said machine, said fixed section protecting the rear segment of said circular blade's periphery,
  • a primary section movably connected to said fixed section, said primary section being retractable relative to said fixed section from a closed position where one end of said primary section rests on said standard to protect a front segment of the blades periphery to an open position where that one end of said primary section is upraised off said standard to allow a cloth stack to be cut by said machine,
  • fastening means adapted to mount said fixed section to said machine, said fastening means being easily operable to allow removal of said fixed section from operative engagement with said machine, removal of-said fixed section from said machine effecting removal of the entire safety guard to allow easy changing of said circular blade.
  • a safety guard for a cloth cutting machine as set forth in claim 1 including spring means fixed to said guard and adapted to continuously bias said primary section toward the closed position.
  • a safety guard for a cloth cutting machine of the vertically oriented, circular blade type said machine including a blade sharpener device fixed to said machine that is adapted to move into and out of sharpening contact with the periphery of said circular blade, said safety guard comprising a primary section movably connected to said machine, said guard section being retractable from a closed position that substantially protects a front segment of the blades periphery to an open position that allows a cloth stack to be cut by said machine, and
  • a notch in said primary section that allows said sharpener device to engage the circular blades periphery at a fixed location relative to that periphery only when said primary section is in the closed position, said notch being misaligned from said sharpener device so that said sharpener device can not engage the circular blades periphery for sharpening when said primary section is in an open position.
  • a safety guard for a cloth cutting machine as set forth in claim 4 including an auxiliary section fixed to said sharpener device,
  • said auxiliary section being sized to overlievsaid notch when said sharpener device is moved out of l2 sharpening contact with said blade and when said primary section isin the closed position.
  • a safety guard for a cloth cutting machine as set forth in claim 4 including said primary section is open.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Sawing (AREA)
  • Details Of Cutting Devices (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Knives (AREA)
US00291361A 1941-10-14 1972-09-20 Safety guard for a cloth cutting machine Expired - Lifetime US3812584A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US414971A US2347877A (en) 1941-10-14 1941-10-14 Method and apparatus for treating crude oil
US00291361A US3812584A (en) 1972-09-20 1972-09-20 Safety guard for a cloth cutting machine
IT48918/73A IT979923B (it) 1972-09-20 1973-03-20 Perfezionamento nei dispositivi di sicurezza per macchine di taglio di tessuti a lama circolare
JP48036160A JPS4970286A (enrdf_load_stackoverflow) 1972-09-20 1973-03-29
GB1976973A GB1435991A (en) 1972-09-20 1973-04-25 Cloth cutting machines
GB5334375A GB1435992A (en) 1972-09-20 1973-04-25 Cloth cutting machines
DE19732347877 DE2347877A1 (de) 1972-09-20 1973-09-19 Schutzvorrichtung fuer eine stoffschneidemaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00291361A US3812584A (en) 1972-09-20 1972-09-20 Safety guard for a cloth cutting machine

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JP (1) JPS4970286A (enrdf_load_stackoverflow)
DE (1) DE2347877A1 (enrdf_load_stackoverflow)
GB (2) GB1435991A (enrdf_load_stackoverflow)
IT (1) IT979923B (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024633A (en) * 1975-11-28 1977-05-24 The Wolf Machine Company Simplified safety guard for a cloth cutting machine
US4062111A (en) * 1976-09-20 1977-12-13 Eastman Machine Company Sharpener mounting structure and knife guard for circular knife type of cloth cutting machine
FR2465829A1 (fr) * 1979-09-25 1981-03-27 Pisani Luigi Off Mec Dispositif en vue de proteger la lame rotative d'une machine a couper les rouleaux de tissu
US4662069A (en) * 1985-09-03 1987-05-05 Jim F. Pate Cutting tool having parallel cutting blades
US4858661A (en) * 1988-06-03 1989-08-22 Porter-Cable Corporation Plate joiner with a handle having a superior orientation
US4858662A (en) * 1988-06-03 1989-08-22 Porter-Cable Corporation Plate joiner having a superior miter guide for mitered carcase joints
US4858663A (en) * 1988-06-03 1989-08-22 Porter-Cable Corporation Plate joiner having a quiet drive
US4934422A (en) * 1988-08-19 1990-06-19 Delta International Machinery Corp. Bench mountable plate joining machine
US5129300A (en) * 1990-06-21 1992-07-14 Ryobi Limited Desk-top type cutter
US5235753A (en) * 1992-03-20 1993-08-17 Black & Decker Inc. Circular saw lower guard chip deflector
DE9311591U1 (de) * 1993-08-03 1994-12-08 W.L. Gore & Associates Gmbh, 85640 Putzbrunn Vorrichtung zum Schneiden, Sägen oder Auftrennen eines auf einer Unterlage aufliegenden Schichtmaterials
US5542183A (en) * 1994-12-23 1996-08-06 Allison; Philip Firefighter's ceiling cutting tool
US5865230A (en) * 1997-06-09 1999-02-02 Porter-Cable Corporation Plate joiner
US6006802A (en) * 1997-06-09 1999-12-28 Porter-Cable Corporation Plate joiner fence height adjustment
US6125896A (en) * 1997-06-09 2000-10-03 Porter-Cable Corporation Plate joiner cutter travel adjustment system
US6336483B1 (en) 1997-06-09 2002-01-08 Porter-Cable Corporation Plate joiner fence angle adjustment system
US7066221B1 (en) * 1997-06-09 2006-06-27 Black & Decker Inc. Plate joiner
US20080078090A1 (en) * 2006-05-19 2008-04-03 Johnson Charles E Iii Manual Saw Guard Retracting Device
US20090199688A1 (en) * 2008-02-12 2009-08-13 Strong Gile M Apparatus for severing a workpiece
CN102346106A (zh) * 2011-08-15 2012-02-08 中纺标(北京)检验认证中心有限公司 快速高效的织物样品切割装置
CN104099775A (zh) * 2013-04-15 2014-10-15 上海特晟机电科技有限公司 切布装置
CN107322667A (zh) * 2017-08-04 2017-11-07 苏州大激自动化科技有限公司 刀带式裁布机
CN111705497A (zh) * 2020-07-03 2020-09-25 连云港连锐针布有限公司 一种针布切边对开机

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LU74321A1 (enrdf_load_stackoverflow) * 1976-02-09 1976-08-13
JPS5627274Y2 (enrdf_load_stackoverflow) * 1977-02-07 1981-06-29
JPS6112489U (ja) * 1984-06-26 1986-01-24 株式会社貝印刃物開発センター 円形刃回転式カツタ−における円形刃の回転抵抗調節構造
DE19630022B4 (de) * 1996-07-25 2007-12-20 Fa. Andreas Stihl Handgeführtes Arbeitsgerät mit einer Schutzhaube
DK1850892T4 (da) 2005-01-24 2023-06-06 Antares Pharma Inc Forfyldt nål-assisteret sprøjtejetinjektor
WO2007131025A1 (en) 2006-05-03 2007-11-15 Antares Pharma, Inc. Injector with adjustable dosing
US9220660B2 (en) 2011-07-15 2015-12-29 Antares Pharma, Inc. Liquid-transfer adapter beveled spike
FI2822618T3 (fi) 2012-03-06 2024-03-21 Antares Pharma Inc Esitäytetty injektioruisku laukeamisvoimaominaisuuden kera
WO2013169800A1 (en) 2012-05-07 2013-11-14 Antares Pharma, Inc. Injection device with cammed ram assembly

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DE309991C (enrdf_load_stackoverflow) *
US1738896A (en) * 1929-07-13 1929-12-10 Swift & Co Meat-saw guard
US2294497A (en) * 1942-06-19 1942-09-01 Zawistowski Martin Portable cutting machine
US2487327A (en) * 1947-08-09 1949-11-08 Jr William E Ganter Linoleum cutting machine
CH314897A (de) * 1953-09-09 1956-07-15 K Mischke Sohn Fa Handschutzvorrichtung an einer Stoffschneidmaschine
US3441067A (en) * 1965-10-22 1969-04-29 Fred A Forcier Mechanical guard lifter

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DE309991C (enrdf_load_stackoverflow) *
US1738896A (en) * 1929-07-13 1929-12-10 Swift & Co Meat-saw guard
US2294497A (en) * 1942-06-19 1942-09-01 Zawistowski Martin Portable cutting machine
US2487327A (en) * 1947-08-09 1949-11-08 Jr William E Ganter Linoleum cutting machine
CH314897A (de) * 1953-09-09 1956-07-15 K Mischke Sohn Fa Handschutzvorrichtung an einer Stoffschneidmaschine
US3441067A (en) * 1965-10-22 1969-04-29 Fred A Forcier Mechanical guard lifter

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024633A (en) * 1975-11-28 1977-05-24 The Wolf Machine Company Simplified safety guard for a cloth cutting machine
FR2333075A1 (fr) * 1975-11-28 1977-06-24 Wolf Machine Cy Dispositif de securite simplifie pour machine a couper les tissus
US4062111A (en) * 1976-09-20 1977-12-13 Eastman Machine Company Sharpener mounting structure and knife guard for circular knife type of cloth cutting machine
FR2465829A1 (fr) * 1979-09-25 1981-03-27 Pisani Luigi Off Mec Dispositif en vue de proteger la lame rotative d'une machine a couper les rouleaux de tissu
US4662069A (en) * 1985-09-03 1987-05-05 Jim F. Pate Cutting tool having parallel cutting blades
US4858661A (en) * 1988-06-03 1989-08-22 Porter-Cable Corporation Plate joiner with a handle having a superior orientation
US4858662A (en) * 1988-06-03 1989-08-22 Porter-Cable Corporation Plate joiner having a superior miter guide for mitered carcase joints
US4858663A (en) * 1988-06-03 1989-08-22 Porter-Cable Corporation Plate joiner having a quiet drive
US4934422A (en) * 1988-08-19 1990-06-19 Delta International Machinery Corp. Bench mountable plate joining machine
US5129300A (en) * 1990-06-21 1992-07-14 Ryobi Limited Desk-top type cutter
US5235753A (en) * 1992-03-20 1993-08-17 Black & Decker Inc. Circular saw lower guard chip deflector
DE9311591U1 (de) * 1993-08-03 1994-12-08 W.L. Gore & Associates Gmbh, 85640 Putzbrunn Vorrichtung zum Schneiden, Sägen oder Auftrennen eines auf einer Unterlage aufliegenden Schichtmaterials
US5542183A (en) * 1994-12-23 1996-08-06 Allison; Philip Firefighter's ceiling cutting tool
US6336483B1 (en) 1997-06-09 2002-01-08 Porter-Cable Corporation Plate joiner fence angle adjustment system
US6006802A (en) * 1997-06-09 1999-12-28 Porter-Cable Corporation Plate joiner fence height adjustment
US6125896A (en) * 1997-06-09 2000-10-03 Porter-Cable Corporation Plate joiner cutter travel adjustment system
US5865230A (en) * 1997-06-09 1999-02-02 Porter-Cable Corporation Plate joiner
US6422275B1 (en) 1997-06-09 2002-07-23 Porter-Cable Coporation Plate joiner
US6612349B2 (en) 1997-06-09 2003-09-02 Porter-Cable Corporation Plate joiner
US7066221B1 (en) * 1997-06-09 2006-06-27 Black & Decker Inc. Plate joiner
US20060260716A1 (en) * 1997-06-09 2006-11-23 Black & Decker Inc. Plate joiner
US20080078090A1 (en) * 2006-05-19 2008-04-03 Johnson Charles E Iii Manual Saw Guard Retracting Device
US20090199688A1 (en) * 2008-02-12 2009-08-13 Strong Gile M Apparatus for severing a workpiece
US9126349B2 (en) * 2008-02-12 2015-09-08 California Industrial Rubber Co., Inc. Apparatus for severing a workpiece
US9782907B2 (en) 2008-02-12 2017-10-10 California Industrial Rubber Co., Inc. Apparatus for severing a workpiece
US10279501B2 (en) 2008-02-12 2019-05-07 California Industrial Rubber Company, Inc. Apparatus for severing a workpiece
US20200122349A1 (en) * 2008-02-12 2020-04-23 California Industrial Rubber Company, Inc. Apparatus for Severing a Workpiece
US10994436B2 (en) * 2008-02-12 2021-05-04 California Industrial Rubber Company, Inc. Apparatus for severing a workpiece
CN102346106A (zh) * 2011-08-15 2012-02-08 中纺标(北京)检验认证中心有限公司 快速高效的织物样品切割装置
CN102346106B (zh) * 2011-08-15 2014-04-23 中纺标(北京)检验认证中心有限公司 快速高效的织物样品切割装置
CN104099775A (zh) * 2013-04-15 2014-10-15 上海特晟机电科技有限公司 切布装置
CN107322667A (zh) * 2017-08-04 2017-11-07 苏州大激自动化科技有限公司 刀带式裁布机
CN111705497A (zh) * 2020-07-03 2020-09-25 连云港连锐针布有限公司 一种针布切边对开机

Also Published As

Publication number Publication date
GB1435992A (en) 1976-05-19
IT979923B (it) 1974-09-30
JPS4970286A (enrdf_load_stackoverflow) 1974-07-08
GB1435991A (en) 1976-05-19
DE2347877A1 (de) 1974-03-28

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