Patent US3869949A successfully refreshed from Google Patents.
US3869949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shear apparatus with improved blade holding means
Assignee: Aetna Standard Engineering Co
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Filing: 1974-02-27
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Granted: 1975-03-11
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Expires: 1994-02-27
Abstract
Abstract A flying shear is disclosed having upper and lower blade assemblies wherein upper and lower blade holders can be slid endwise out of the machine when replacing cutting blades and are rigidly clamped in position by adjustable tapered wedges acting against shoulders on the blade holder. The lower blade holder is mounted on a trapezoidal mounting member which has a small taper on both sides and is clamped between two oppositely tapered wedges in such a way that the gap between the cutting blades can be adjusted very easily while maintaining substantially perfect alignment of the blades by sliding the wedges lengthwise. Adjusting screws are provided to simplify this adjustment. Dovetail joints are provided between the side edges of the upper blade holder and its cooperating wedge and upper mounting member to prevent the upper blade holder from dropping out of its mounting member.
Inventors
- 👤 David E Dolle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:55
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/002; B23D25/00; B23D25/02; B23D25/04; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4757; Y10T83/4763; Y10T83/4766; Y10T83/4783; Y10T83/4786; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9483; Y10T83/9486
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
258 words
In a machine of the character described, an upper platen having an upper supporting member mounted thereon, a lower platen having a lower supporting member mounted therein in vertical alignment with said upper supporting member, means for causing relative vertical movement of said platens toward and away from each other, a removable elongated top blade holder and top blade rigidly mounted on said upper supporting member, spaced shoulders in the upper portion of said lower supporting member having parallel side faces, a mounting member and a pair of elongated wedges mounted in the space between said shoulders for sliding movement lengthwise toward one side of the machine, a removable elongated lower blade holder and lower blade rigidly mounted on said mounting member, said wedges being mounted on opposite sides of said mounting member and having outer side surfaces slidably engaging said side faces of said shoulders and flat tapered inner side faces slidably engaging the side faces of said mounting member, said tapered side faces having the same amount of taper and being adapted to position said lower blade parallel to said top blade when the two wedges are forced against said mounting member and against the side faces of said shoulders, releasable hold-down means for clamping each wedge in its adjusted position, and releasable means for preventing sliding movement of said mounting member out of its adjusted position, said lower blade holder and lower blade being removable with said mounting member by sliding them lengthwise out of the side of the machine after said wedges are loosened.
Claim 2
Dependent Claim
258 words
In a machine of the character described, an upper platen having an upper supporting member mounted thereon, a lower platen having a lower supporting member mounted therein in vertical alignment with said upper supporting member, means for causing relative vertical movement of said platens toward and away from each other, a removable elongated top blade holder and top blade rigidly mounted on said upper supporting member, spaced shoulders in the upper portion of said lower supporting member having parallel side faces, a mounting member and a pair of elongated wedges mounted in the space between said shoulders for sliding movement lengthwise toward one side of the machine, a removable elongated lower blade holder and lower blade rigidly mounted on said mounting member, said wedges being mounted on opposite sides of said mounting member and having outer side surfaces slidably engaging said side faces of said shoulders and flat tapered inner side faces slidably engaging the side faces of said mounting member, said tapered side faces having the same amount of taper and being adapted to position said lower blade parallel to said top blade when the two wedges are forced against said mounting member and against the side faces of said shoulders, releasable hold-down means for clamping each wedge in its adjusted position, and releasable means for preventing sliding movement of said mounting member out of its adjusted position, said lower blade holder and lower blade being removable with said mounting member by sliding them lengthwise out of the side of the machine after said wedges are loosened.
Claim 3
Dependent Claim
258 words
In a machine of the character described, an upper platen having an upper supporting member mounted thereon, a lower platen having a lower supporting member mounted therein in vertical alignment with said upper supporting member, means for causing relative vertical movement of said platens toward and away from each other, a removable elongated top blade holder and top blade rigidly mounted on said upper supporting member, spaced shoulders in the upper portion of said lower supporting member having parallel side faces, a mounting member and a pair of elongated wedges mounted in the space between said shoulders for sliding movement lengthwise toward one side of the machine, a removable elongated lower blade holder and lower blade rigidly mounted on said mounting member, said wedges being mounted on opposite sides of said mounting member and having outer side surfaces slidably engaging said side faces of said shoulders and flat tapered inner side faces slidably engaging the side faces of said mounting member, said tapered side faces having the same amount of taper and being adapted to position said lower blade parallel to said top blade when the two wedges are forced against said mounting member and against the side faces of said shoulders, releasable hold-down means for clamping each wedge in its adjusted position, and releasable means for preventing sliding movement of said mounting member out of its adjusted position, said lower blade holder and lower blade being removable with said mounting member by sliding them lengthwise out of the side of the machine after said wedges are loosened.
Claim 4
Dependent Claim
258 words
In a machine of the character described, an upper platen having an upper supporting member mounted thereon, a lower platen having a lower supporting member mounted therein in vertical alignment with said upper supporting member, means for causing relative vertical movement of said platens toward and away from each other, a removable elongated top blade holder and top blade rigidly mounted on said upper supporting member, spaced shoulders in the upper portion of said lower supporting member having parallel side faces, a mounting member and a pair of elongated wedges mounted in the space between said shoulders for sliding movement lengthwise toward one side of the machine, a removable elongated lower blade holder and lower blade rigidly mounted on said mounting member, said wedges being mounted on opposite sides of said mounting member and having outer side surfaces slidably engaging said side faces of said shoulders and flat tapered inner side faces slidably engaging the side faces of said mounting member, said tapered side faces having the same amount of taper and being adapted to position said lower blade parallel to said top blade when the two wedges are forced against said mounting member and against the side faces of said shoulders, releasable hold-down means for clamping each wedge in its adjusted position, and releasable means for preventing sliding movement of said mounting member out of its adjusted position, said lower blade holder and lower blade being removable with said mounting member by sliding them lengthwise out of the side of the machine after said wedges are loosened.
Claim 5
Dependent Claim
33 words
The combination of claim 1 wherein adjusting screw means are provided on said lower supporting member for moving each of said wedges, said means being located at said one side of the machine.
Claim 6
Dependent Claim
51 words
The combination of claim 1 wherein said wedges, are tapered in opposite directions and said mounting member is generally in the form of a trapezoid having tapered side faces which engage the tapered faces of the two wedges substantially throughout the length thereof when the mounting member is clamped in position.
Claim 7
Dependent Claim
36 words
The combination of claim 3 wherein the wider end of said mounting member is located at said one side of the machine to facilitate sliding out of said recess when the lower blade holder is removed.
Claim 8
Dependent Claim
118 words
The combination of claim 1 wherein shoulders are provided on said top supporting member, an elongated upper mounting member and an elongated upper wedge are mounted in the space between said shoulders for sliding movement lengthwise toward said one side of the machine, said top blade holder is rigidly mounted on said upper mounting member, said upper mounting member and said upper wedge when clamped in position in said space have tapered side faces which fit together along the length of the upper wedge and outer side faces which engage side faces of said shoulders, and releasable hold-down means are provided for clamping said upper mounting member and said upper wedge in position on said to supporting member.
Claim 9
Dependent Claim
61 words
The combination of claim 5 wherein one of said shoulders has a side face adapted to contact one side face of said upper mounting member in overlapping engagement to support the same, and the tapered side face of said upper wedge is adapted to contact the other side face of said upper mounting member in overlapping engagement to support the same.
Claim 10
Dependent Claim
80 words
The combination of claim 6 wherein screw means are provided on said top supporting membeR at said one side of the machine to adjust the position of said upper wedge, and releasable hold-down screws are provided in said upper wedge to attach it to said upper supporting member, said upper mounting member having its wider end located near said screw means to permit the upper mounting member to slide lengthwise out of said recess when said hold-down screws are loosened.
Claim 11
Dependent Claim
237 words
In a shear having upper and lower platens mounted to reciprocate vertically, means for feeding sheet material between said platens, upper and lower blade assemblies mounted between said platens to reciprocate horizontally in unison in the direction of feed of the sheet material, means mounting said blade assemblies for vertical reciprocation while maintaining the vertical alignment thereof, the improvement which comprises an upper horizontal supporting member on the upper blade assembly having a top blade holder and a top blade rigidly mounted on said upper supporting member, said blade holder having a tapered mounting member slidably mounted on said upper supporting member, an elongated upper wedge mounted on said upper supporting member to slide parallel to said mounting member to a position wherein it rigidly clamps the mounting member in position, a horizontal lower supporting member on the lower blade assembly having a pair of shoulders with parallel side faces, a tapered lower mounting member slidably mounted in the space between said shoulders, a lower blade holder and a lower blade rigidly mounted on said lower mounting member, a pair of lower wedges in said space on opposite sides of said lower mounting member, said lower wedges providing means for rigidly clamping said lower mounting member in adjusted positions wherein said lower blade is parallel to said upper blade, and means for adjusting the position of said lower wedges to adjust the horizontal gap between said blades.
Claim 12
Dependent Claim
237 words
In a shear having upper and lower platens mounted to reciprocate vertically, means for feeding sheet material between said platens, upper and lower blade assemblies mounted between said platens to reciprocate horizontally in unison in the direction of feed of the sheet material, means mounting said blade assemblies for vertical reciprocation while maintaining the vertical alignment thereof, the improvement which comprises an upper horizontal supporting member on the upper blade assembly having a top blade holder and a top blade rigidly mounted on said upper supporting member, said blade holder having a tapered mounting member slidably mounted on said upper supporting member, an elongated upper wedge mounted on said upper supporting member to slide parallel to said mounting member to a position wherein it rigidly clamps the mounting member in position, a horizontal lower supporting member on the lower blade assembly having a pair of shoulders with parallel side faces, a tapered lower mounting member slidably mounted in the space between said shoulders, a lower blade holder and a lower blade rigidly mounted on said lower mounting member, a pair of lower wedges in said space on opposite sides of said lower mounting member, said lower wedges providing means for rigidly clamping said lower mounting member in adjusted positions wherein said lower blade is parallel to said upper blade, and means for adjusting the position of said lower wedges to adjust the horizontal gap between said blades.
Claim 13
Dependent Claim
134 words
A blade assembly for a shear comprising an elongated supporting member having spaced shoulders, a tapered removable mounting member mounted for longitudinal sliding movement into and out of the space between said shoulders, a blade holder and a cutting blade rigidly carried by said mounting member, said blade extending generally in the direction of sliding movement, means for clamping said mounting member in a fixed position in said space comprising an elongated wedge mounted in said space for longitudinal sliding movement, said wedge having an outer side surface slidably engaging one of said shoulders and having a tapered inner side face slidably engaging one side face of said mounting member, and means for rigidly connecting said wedge to said supporting member so that the wedge holds said mounting member in position between said shoulders.
Claim 14
Dependent Claim
134 words
A blade assembly for a shear comprising an elongated supporting member having spaced shoulders, a tapered removable mounting member mounted for longitudinal sliding movement into and out of the space between said shoulders, a blade holder and a cutting blade rigidly carried by said mounting member, said blade extending generally in the direction of sliding movement, means for clamping said mounting member in a fixed position in said space comprising an elongated wedge mounted in said space for longitudinal sliding movement, said wedge having an outer side surface slidably engaging one of said shoulders and having a tapered inner side face slidably engaging one side face of said mounting member, and means for rigidly connecting said wedge to said supporting member so that the wedge holds said mounting member in position between said shoulders.
Claim 15
Dependent Claim
61 words
The blade assembly of claim 9 in which said one side face of said mounting member overlaps the tapered side face of said wedge and the other side face of said mounting member overlaps a side face of said shoulder, whereby the overlapping surfaces provide supporting means for said mounting member to prevent it from moving away from said supporting member.
Claim 16
Dependent Claim
24 words
The blade assembly of claim 10 in which said overlapping surfaces are flat and inclined to provide a dovetail support for said mounting member.
Claim 17
Dependent Claim
106 words
The blade assembly of claim 9 in which a second elongated wedge is mounted in said space between said shoulders for longitudinal sliding movement, said second wedge having an outer side surface slidably engaging the other of said shoulders and having a tapered inner side face slidably engaging the other side face of said mounting member, and in which adjusting means are provided on said supporting member for changing the longitudinal position of each wedge, said shoulders being parallel and said wedges being tapered in the same direction so that the position of the cutting blades can be adjusted by moving the wedges in opposite directions.
Claim 18
Dependent Claim
219 words
In a blade assembly for a shear, a horizontal lower supporting member having a recess in the upper face thereof with a flat bottom surface and flat parallel side faces, a tapered mounting member and a pair of wedges mounted in said recess on said bottom surface for horizontal sliding parallel to said side faces, a blade holder and blade rigidly mounted on said mounting member, said wedges being mounted on opposite sides of said mounting member and having flat outer side surfaces slidably engaging said side faces of said recess and flat tapered inner side faces slidably engaging the side faces of said mounting member, the tapered side face of one wedge having the same amount of taper as the tapered side face of the other wedge and the same amount of taper as each side of the mounting member, the wide end of the mounting member being located adjacent the narrow ends of the wedges so that, when the wedges are tightened the mounting member and the blade are securely held in a predetermined angular position with respect to said recess and so that the mounting member can be accurately adjusted toward or away from the side faces of the recess by changing the clamped positions of the wedges without changing the angular position of said blade.
Claim 19
Dependent Claim
219 words
In a blade assembly for a shear, a horizontal lower supporting member having a recess in the upper face thereof with a flat bottom surface and flat parallel side faces, a tapered mounting member and a pair of wedges mounted in said recess on said bottom surface for horizontal sliding parallel to said side faces, a blade holder and blade rigidly mounted on said mounting member, said wedges being mounted on opposite sides of said mounting member and having flat outer side surfaces slidably engaging said side faces of said recess and flat tapered inner side faces slidably engaging the side faces of said mounting member, the tapered side face of one wedge having the same amount of taper as the tapered side face of the other wedge and the same amount of taper as each side of the mounting member, the wide end of the mounting member being located adjacent the narrow ends of the wedges so that, when the wedges are tightened the mounting member and the blade are securely held in a predetermined angular position with respect to said recess and so that the mounting member can be accurately adjusted toward or away from the side faces of the recess by changing the clamped positions of the wedges without changing the angular position of said blade.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |