CA1205039A - Seal for edges of enclosed belt conveyor - Google Patents
Seal for edges of enclosed belt conveyorInfo
- Publication number
- CA1205039A CA1205039A CA000437160A CA437160A CA1205039A CA 1205039 A CA1205039 A CA 1205039A CA 000437160 A CA000437160 A CA 000437160A CA 437160 A CA437160 A CA 437160A CA 1205039 A CA1205039 A CA 1205039A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- edge
- seal
- housing
- granular material
- 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
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- Structure Of Belt Conveyors (AREA)
Abstract
SEAL FOR EDGES OF ENCLOSED BELT CONVEYOR
ABSTRACT OF THE DISCLOSURE
A horizontal belt conveyor is arranged with its upper surface as the bottom of a covered trough in which granular material is conveyed. A seal is formed between the lower edge of the side wall and the edge of the belt to prevent spillage of the granular material conveyed within the trough.
ABSTRACT OF THE DISCLOSURE
A horizontal belt conveyor is arranged with its upper surface as the bottom of a covered trough in which granular material is conveyed. A seal is formed between the lower edge of the side wall and the edge of the belt to prevent spillage of the granular material conveyed within the trough.
Description
3~
SEAL FOR EDGES OF ENCLOSED BELT CONVEYOR
TECHNICAL FIELD
The present invention relates to a seal between th~
edges of a belt conveyor sides which enclose the material con-veyed on top of the belt. More particularly, the invention re-lates to a seal at the edges of a belt conveyor ancl its sides without contact with the upper side of the belt edge.
BACKGROUND ART
Belt conveyors are now familiar structures for the trans-port of objects. Many ingenious arrangements of belt conveyorshave been developed to transport objects up and down inclines ancl in horizontal non-linear lines of travel. The present prob-lem will be solved as connected with the more or less horizon-tally extended belt conveyor in its simpler form. Therefore, consider the endless belt as it extends its upper horizontal sur-face over idler and powered rolls. The material of the endless belt is not of present concern to the invention, It can be of canvas, rubber, cloth, etc. Almost any material of sufficient flexibility and strength, which will function in the form of an endless loop over idler and powered rolls, will function satis-factorily.
The transport of an endless number of solid objects has, perhaps, its most dramatic embodiment in the luggage convey-ors in airports. However, the present problem descends with the need to convey granular material on the upper surface of the belt conveyor. ~ost obvious is the initial limitation of belt width and its transverse loading of granular material. The first limi-tation becomes obvious with the necessity for preventing the granular material from falling off the sides of the belt. De-pending on the nature of the granular material, the limitation of material quantity per linear unit length of belt can be severe.
The present problem has two aspects. First, there isthe problem of increasing the granular material loading per lin-ear unit length of the belt. Second, is the problem of sealing between the upper sides o~ the belt edges and any structure pro-vided to increase the loading capacity.
DISCLOSURE OF THE INVENTION
The present invention contemplates the provision of seals between the lower edges of substantially vertical walls extending up from the upper surface of an endless belt conveyor and the upper surface of the belt edge for the containment of granular material between the walls and over the surface of the moving belt of the conveyor.
The invention further contemplates a C-shaped groove re-ceiving the belt edge on a bearing member on the under side ofthe belt edge and supporting the edge of the belt above the hori-- zontal plane of its central load-bearing body.
The invention further contemplates provision in the C-shaped groove for accommodation of a quantity of the granular material conveyed on the surface of the horizontal plane of the load-bearing body.
Other objects, advantages, and Features of the invention will become apparent to one skilled in the art upon consideration of the written specification3 appended claims and accompanying drawings.
BRIEF DESIGNATION OF THE DRA~INGS
Fig. 1 is a sectioned elevation of a belt conveyor in which the present invention is embodied;
Fig. 2 is a sectioned elevation of Fig- 1 along lines
SEAL FOR EDGES OF ENCLOSED BELT CONVEYOR
TECHNICAL FIELD
The present invention relates to a seal between th~
edges of a belt conveyor sides which enclose the material con-veyed on top of the belt. More particularly, the invention re-lates to a seal at the edges of a belt conveyor ancl its sides without contact with the upper side of the belt edge.
BACKGROUND ART
Belt conveyors are now familiar structures for the trans-port of objects. Many ingenious arrangements of belt conveyorshave been developed to transport objects up and down inclines ancl in horizontal non-linear lines of travel. The present prob-lem will be solved as connected with the more or less horizon-tally extended belt conveyor in its simpler form. Therefore, consider the endless belt as it extends its upper horizontal sur-face over idler and powered rolls. The material of the endless belt is not of present concern to the invention, It can be of canvas, rubber, cloth, etc. Almost any material of sufficient flexibility and strength, which will function in the form of an endless loop over idler and powered rolls, will function satis-factorily.
The transport of an endless number of solid objects has, perhaps, its most dramatic embodiment in the luggage convey-ors in airports. However, the present problem descends with the need to convey granular material on the upper surface of the belt conveyor. ~ost obvious is the initial limitation of belt width and its transverse loading of granular material. The first limi-tation becomes obvious with the necessity for preventing the granular material from falling off the sides of the belt. De-pending on the nature of the granular material, the limitation of material quantity per linear unit length of belt can be severe.
The present problem has two aspects. First, there isthe problem of increasing the granular material loading per lin-ear unit length of the belt. Second, is the problem of sealing between the upper sides o~ the belt edges and any structure pro-vided to increase the loading capacity.
DISCLOSURE OF THE INVENTION
The present invention contemplates the provision of seals between the lower edges of substantially vertical walls extending up from the upper surface of an endless belt conveyor and the upper surface of the belt edge for the containment of granular material between the walls and over the surface of the moving belt of the conveyor.
The invention further contemplates a C-shaped groove re-ceiving the belt edge on a bearing member on the under side ofthe belt edge and supporting the edge of the belt above the hori-- zontal plane of its central load-bearing body.
The invention further contemplates provision in the C-shaped groove for accommodation of a quantity of the granular material conveyed on the surface of the horizontal plane of the load-bearing body.
Other objects, advantages, and Features of the invention will become apparent to one skilled in the art upon consideration of the written specification3 appended claims and accompanying drawings.
BRIEF DESIGNATION OF THE DRA~INGS
Fig. 1 is a sectioned elevation of a belt conveyor in which the present invention is embodied;
Fig. 2 is a sectioned elevation of Fig- 1 along lines
2-2;
Fig. 3 is a plan view of Fig. 1, sectioned along lines
Fig. 3 is a plan view of Fig. 1, sectioned along lines
3-3; and Fig. 4, is an enlarged sectioned elevation of the belt edge and bearing of Fig. 2.
BEST MODE FOR CARRYING OUT THE INVENTION
The Belt Conveyor In principle, the basic belt conveyor is quite simple in structure. A web, or belt, of flexible material is fnrmed into an endless loop with rolls at each end to determine the basic tautness with which the loop is held. As appropriate to form a supporting surface, additional rolls may be placed in parallel between the two end rolls, the upper half of the belt loop supported by some of the rolls. One, or both, of the end rolls may be powered to move the upper surface of the belt con-tinuously from one end roll toward the other. There are, of course, endless modifications of this simple arrangement. For example, contiguous rolls may be journaled in bearings between frame members, the frame held at an angle. Solid articles to be conveyed may gravitate smoothly down this bed of rolls to a desired destination at the end of the frame. However, the pres-ent invention is concerned with the seal at the edge of the end-less belt, powered in roller-towel fashion, to convey objects placed upon its more or less horizontal upper surface.
All of the figures disclose the roller conveyor embodied in belt 1 as supported and driven by idler and powered rolls.
More specifically, in Fig. 1, belt 1 is led over the end rolls 2 and 3, and intermediate idler rolls ~. Means for rotating one or more of the rolls 2 and 3 is not disclosed, because it would be a needless complication of the disclosure.
The present invention is concerned with the transport of granular material on the belt conveyor. A spout means 5 is disclosed as deliverying granular material 6 to the end 7 of the conveyor. This material is then conveyed a horizontal distance and predetermined quantities are delivered to designated stations.
No description is expended upon the framework necessary for the support of the rolls in Fig. 1. It is apparent how such rolls are journaled into bearings and the bearings supported by a framework. For the present purpose of disclosure, attention is focused on the upper surface of belt 1, the delivery of granu-lar material to that surface, and the rolls which support and move the belt. Attention is temporarily directed to Fig. 2.
Side Walls The delivery of the granular material to, and its trans-port by, the upper surface of a belt conveyor has the problern of maintaining the flowable body of the material on the upper surface o~ the belt as the material is moved toward its destination.
W;thout side walls, the amount of material per linear length of the belt has been limited by the angle of repose of the granular material and the vibratory action of the belt. Obviously, if more than a maximum amount of the material were placed on the upper surface of the belt, the subsequent movement of the belt, including its vibration, would cause transverse travel of the material until it began to fall from the edges of the conveyor.
In Fig. 2, elements of the present invention are em-bodied in seal structure on the lower edges of side walls 10 and 11. These side walls are provided by elongated structures mounted along each edge of belt 1. Each of these structures 10 and 11 appear in cross section as having channel beam configuration.
As observed in Fig. 2, the lower flanges of channel-like struc-tures 10 and 11 are mounted above a portion of each edge of belt1. Beneath each belt 1 edge is the structure supporting the idler roll 4. This supporting structure for the roll also is formed with an upper flange. Therefore, the opposite edge por~
tions of belt 1 are sandwiched between a lower flange of the wall structures 10 and 11 and the upper flange of the idler roll sup port structure. The idler support structure is generally desig-nated at 12 and 13. The ends of the flanges are joined, as disclosed in Fig. 2, and form a housiny into which a portion of each edge if belt 1 can be described a journaled. Finally, structures 10 and 11 have the primary function of providing sur-Faces 14 and 15 which form, with the upper surface of belt 1, a trough down which the granular material 6 is conveyed. Now, the granular material may be fed into one end of the trough to a sig-nificant vertical depth and transported to the predetermined station to which it is to be delivered.
The upper Flanges of structures 10 and '11 are disclosed as supporting a top member 16. This top member 16, positioned as disclosed in Fig. 2, provides a surface 17 which completes the enclosure of the granular material 6 within its trough. Thus, enclosed, the granular material is prevented from discharging in-to the environment with consequent collection upon the conveyor structure. The width of member 16 can be extended until there is formed an effective housing for the entire conveyor~ as well 3~3~
as the granular material conveyed on belt 1.
Side Delivery of Conveyed Material Fig. 3 looks down upon the conveyor of Fig. 1. The top 16 ;s removed to disclose the upper sur~ace of belt 1, the location of the entry station for material to be conveyed, and a station at 20 to which it is required a predetermined amount of the conveyed material be delivered. As in Fig. 1, the mate-rial flows from left to right, as viewed in the drawing. At stat;on 20, a shoot 21 is formed to receive the granular mate-rial from belt 1. A panel 22 is formed from the side of wall 11 and hinged to this side at 23. This hinge is positioned on the "downstream" edge of the panel 22. The panel 22 has an "upstream" edge 24.
The hinged panel 22 is swung inward toward the surface 14 of wall 10. When engagement occurs between the edge 24 and surface 14j the surface of the panel 22 becomes a diverter for the granular material 6. At the angle provided by the panel, the granular rnaterial is shunted through shoot 21 and to any con-venient receptacle provided at station 20.
The provision of structure to move hinged panel 22 to the diverting position may take various forms. A handle 25 for manual positioning is disclosed. A mechanical linkage to a power mechanism may, alternatively, be readily adaptable -to move the panel. In any event, the panel is moved to its diverting posi-tion for the length of time necessary to deliver the required quantity of material from belt 1 to station 20. The panel is then repositioned to become a part of wall 11 and the granular material flowed along to its next point of delivery.
Belt Edge Seal In Fig. 2~ the necessary seal between the side walls 11 and 12 and the underlying idler support structure 12 and 13 was given only perfunctory description. The specification hur-ried on to deal with the function of side walls 10 and 11 as they form the trough with the upper surface of belt 1. The pres-ent invention is embodied in this seal structure which is neces-sary to prevent spillage of granular material from the trough.
Fig. 4 is established to disclose the preferred embodi-ment of the seal structure at both edges of belt 1. Specifically9 t~
Fig. 4 discloses the seal structure between the flanye 30 and flange 31 which are extended parallel to each other from their respective side wall 11 and idler support structure 13. Between the parallel, inner surfaces of these flanges, the "housing" of Fig. 2 is formed to receive a portion of the edge of belt 1.
The outer edges of flanges 30,31 are positively sealed by the main body 32 of a bearing structure 33 clamped by a -form of fastener, bringing flanges 30,31 down upon the bearing body 32 in a sandwich. Bearing body 32 is dimensioned to space the inner surface of flanges 30 and 31 from each other to form a housing to loosely receive edge portion 34 of belt 1. It is im-portant that no seal structure, formed to zealously confine the granular material 6, ends up by exerting a force upon the sur-faces of belt edge 34 which will unduly absorb the power with which belt 1 is moved to carry out its mission of transport. At the same time, it is required that the seal must prevent the migration of grain from the top of belt edge 34 along its lower surface and to ultimately spill from the conveyor below the belt. To provide both a minimum of friction for the belt edge 34 and a minimum of spillage of granular material, the present invention finds embodiment in the essential element of bearing 33. From its cross section of Fig. 4, bearing 33 has already been defined as having a main body portion 32 which functions to space flanges 30,31. From this main body 32, a belt-supporting lip 35 is extended back toward the center line of the belt trough.
This lip 35 underlies a substantial portion of the belt edge 34.
The significant feature to this lip element is that it terminates inward within the housing in a ramp 36. In effect, ramp 36 curls up the outer portion of edge 34 at an angle which will "cup" any granular material 6 which flows into the flange housing and turn it back away from the belt edge.
Of course, bearing 33 extends as an elongated strip be-tween the flanges 30 and 31. In Fig. 4, this strip is examined only in cross section. However, this disclosure in Fig. 4 is adequate to understand the function of this essential element of the invention. Bearing 33 is conveniently made of a plasticg preferably polyethylene. The surface of such material gives no significant friction to the underside of belt edge 34. At the same time, the body of granular material 6 which flows into the 3~
flange housing holds the belt firmly against the bearing surfaces at locations 35 and 36, forming a continuous seal to contain the granular material 6 on the top side of the belt.
It has been determined through experience that the effec-tiveness of the seal relies heavily on 1) flange 30 extending inover the belt, forming the cavity; 2) the depth of the cavity formed between the upper surface of belt 1 and the lower surface of flange 30 should be between 1/2" and 1"; 3) the existence oF
flat portion 35 of bearing 33; and 4) the ramped ~p edge of belt 1 at an angle of approximately 30 to the horizontal.
From the foregoing, it will be seen that this invention is one well adapted to attain all of the ends and objects herein-above set forth, together with other advantages which are obvious and inherent to the apparatus.
It will understood that certain features and subcombin-ations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the invention.
As many possible embodiments may be made of the inven-tion without departing from the scope thereof, it is to be under-stood that all matter herein set forth or shown in the accompany-ing drawings is to be interpreted in an illustrative and not in a limiting sense.
BEST MODE FOR CARRYING OUT THE INVENTION
The Belt Conveyor In principle, the basic belt conveyor is quite simple in structure. A web, or belt, of flexible material is fnrmed into an endless loop with rolls at each end to determine the basic tautness with which the loop is held. As appropriate to form a supporting surface, additional rolls may be placed in parallel between the two end rolls, the upper half of the belt loop supported by some of the rolls. One, or both, of the end rolls may be powered to move the upper surface of the belt con-tinuously from one end roll toward the other. There are, of course, endless modifications of this simple arrangement. For example, contiguous rolls may be journaled in bearings between frame members, the frame held at an angle. Solid articles to be conveyed may gravitate smoothly down this bed of rolls to a desired destination at the end of the frame. However, the pres-ent invention is concerned with the seal at the edge of the end-less belt, powered in roller-towel fashion, to convey objects placed upon its more or less horizontal upper surface.
All of the figures disclose the roller conveyor embodied in belt 1 as supported and driven by idler and powered rolls.
More specifically, in Fig. 1, belt 1 is led over the end rolls 2 and 3, and intermediate idler rolls ~. Means for rotating one or more of the rolls 2 and 3 is not disclosed, because it would be a needless complication of the disclosure.
The present invention is concerned with the transport of granular material on the belt conveyor. A spout means 5 is disclosed as deliverying granular material 6 to the end 7 of the conveyor. This material is then conveyed a horizontal distance and predetermined quantities are delivered to designated stations.
No description is expended upon the framework necessary for the support of the rolls in Fig. 1. It is apparent how such rolls are journaled into bearings and the bearings supported by a framework. For the present purpose of disclosure, attention is focused on the upper surface of belt 1, the delivery of granu-lar material to that surface, and the rolls which support and move the belt. Attention is temporarily directed to Fig. 2.
Side Walls The delivery of the granular material to, and its trans-port by, the upper surface of a belt conveyor has the problern of maintaining the flowable body of the material on the upper surface o~ the belt as the material is moved toward its destination.
W;thout side walls, the amount of material per linear length of the belt has been limited by the angle of repose of the granular material and the vibratory action of the belt. Obviously, if more than a maximum amount of the material were placed on the upper surface of the belt, the subsequent movement of the belt, including its vibration, would cause transverse travel of the material until it began to fall from the edges of the conveyor.
In Fig. 2, elements of the present invention are em-bodied in seal structure on the lower edges of side walls 10 and 11. These side walls are provided by elongated structures mounted along each edge of belt 1. Each of these structures 10 and 11 appear in cross section as having channel beam configuration.
As observed in Fig. 2, the lower flanges of channel-like struc-tures 10 and 11 are mounted above a portion of each edge of belt1. Beneath each belt 1 edge is the structure supporting the idler roll 4. This supporting structure for the roll also is formed with an upper flange. Therefore, the opposite edge por~
tions of belt 1 are sandwiched between a lower flange of the wall structures 10 and 11 and the upper flange of the idler roll sup port structure. The idler support structure is generally desig-nated at 12 and 13. The ends of the flanges are joined, as disclosed in Fig. 2, and form a housiny into which a portion of each edge if belt 1 can be described a journaled. Finally, structures 10 and 11 have the primary function of providing sur-Faces 14 and 15 which form, with the upper surface of belt 1, a trough down which the granular material 6 is conveyed. Now, the granular material may be fed into one end of the trough to a sig-nificant vertical depth and transported to the predetermined station to which it is to be delivered.
The upper Flanges of structures 10 and '11 are disclosed as supporting a top member 16. This top member 16, positioned as disclosed in Fig. 2, provides a surface 17 which completes the enclosure of the granular material 6 within its trough. Thus, enclosed, the granular material is prevented from discharging in-to the environment with consequent collection upon the conveyor structure. The width of member 16 can be extended until there is formed an effective housing for the entire conveyor~ as well 3~3~
as the granular material conveyed on belt 1.
Side Delivery of Conveyed Material Fig. 3 looks down upon the conveyor of Fig. 1. The top 16 ;s removed to disclose the upper sur~ace of belt 1, the location of the entry station for material to be conveyed, and a station at 20 to which it is required a predetermined amount of the conveyed material be delivered. As in Fig. 1, the mate-rial flows from left to right, as viewed in the drawing. At stat;on 20, a shoot 21 is formed to receive the granular mate-rial from belt 1. A panel 22 is formed from the side of wall 11 and hinged to this side at 23. This hinge is positioned on the "downstream" edge of the panel 22. The panel 22 has an "upstream" edge 24.
The hinged panel 22 is swung inward toward the surface 14 of wall 10. When engagement occurs between the edge 24 and surface 14j the surface of the panel 22 becomes a diverter for the granular material 6. At the angle provided by the panel, the granular rnaterial is shunted through shoot 21 and to any con-venient receptacle provided at station 20.
The provision of structure to move hinged panel 22 to the diverting position may take various forms. A handle 25 for manual positioning is disclosed. A mechanical linkage to a power mechanism may, alternatively, be readily adaptable -to move the panel. In any event, the panel is moved to its diverting posi-tion for the length of time necessary to deliver the required quantity of material from belt 1 to station 20. The panel is then repositioned to become a part of wall 11 and the granular material flowed along to its next point of delivery.
Belt Edge Seal In Fig. 2~ the necessary seal between the side walls 11 and 12 and the underlying idler support structure 12 and 13 was given only perfunctory description. The specification hur-ried on to deal with the function of side walls 10 and 11 as they form the trough with the upper surface of belt 1. The pres-ent invention is embodied in this seal structure which is neces-sary to prevent spillage of granular material from the trough.
Fig. 4 is established to disclose the preferred embodi-ment of the seal structure at both edges of belt 1. Specifically9 t~
Fig. 4 discloses the seal structure between the flanye 30 and flange 31 which are extended parallel to each other from their respective side wall 11 and idler support structure 13. Between the parallel, inner surfaces of these flanges, the "housing" of Fig. 2 is formed to receive a portion of the edge of belt 1.
The outer edges of flanges 30,31 are positively sealed by the main body 32 of a bearing structure 33 clamped by a -form of fastener, bringing flanges 30,31 down upon the bearing body 32 in a sandwich. Bearing body 32 is dimensioned to space the inner surface of flanges 30 and 31 from each other to form a housing to loosely receive edge portion 34 of belt 1. It is im-portant that no seal structure, formed to zealously confine the granular material 6, ends up by exerting a force upon the sur-faces of belt edge 34 which will unduly absorb the power with which belt 1 is moved to carry out its mission of transport. At the same time, it is required that the seal must prevent the migration of grain from the top of belt edge 34 along its lower surface and to ultimately spill from the conveyor below the belt. To provide both a minimum of friction for the belt edge 34 and a minimum of spillage of granular material, the present invention finds embodiment in the essential element of bearing 33. From its cross section of Fig. 4, bearing 33 has already been defined as having a main body portion 32 which functions to space flanges 30,31. From this main body 32, a belt-supporting lip 35 is extended back toward the center line of the belt trough.
This lip 35 underlies a substantial portion of the belt edge 34.
The significant feature to this lip element is that it terminates inward within the housing in a ramp 36. In effect, ramp 36 curls up the outer portion of edge 34 at an angle which will "cup" any granular material 6 which flows into the flange housing and turn it back away from the belt edge.
Of course, bearing 33 extends as an elongated strip be-tween the flanges 30 and 31. In Fig. 4, this strip is examined only in cross section. However, this disclosure in Fig. 4 is adequate to understand the function of this essential element of the invention. Bearing 33 is conveniently made of a plasticg preferably polyethylene. The surface of such material gives no significant friction to the underside of belt edge 34. At the same time, the body of granular material 6 which flows into the 3~
flange housing holds the belt firmly against the bearing surfaces at locations 35 and 36, forming a continuous seal to contain the granular material 6 on the top side of the belt.
It has been determined through experience that the effec-tiveness of the seal relies heavily on 1) flange 30 extending inover the belt, forming the cavity; 2) the depth of the cavity formed between the upper surface of belt 1 and the lower surface of flange 30 should be between 1/2" and 1"; 3) the existence oF
flat portion 35 of bearing 33; and 4) the ramped ~p edge of belt 1 at an angle of approximately 30 to the horizontal.
From the foregoing, it will be seen that this invention is one well adapted to attain all of the ends and objects herein-above set forth, together with other advantages which are obvious and inherent to the apparatus.
It will understood that certain features and subcombin-ations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the invention.
As many possible embodiments may be made of the inven-tion without departing from the scope thereof, it is to be under-stood that all matter herein set forth or shown in the accompany-ing drawings is to be interpreted in an illustrative and not in a limiting sense.
Claims (6)
1. In an endless belt conveyor which has a side wall rising vertically over an edge of the belt and is flanged on the lower end of the wall parallel to a flange on the under side of the belt edge to form a housing receiv-ing the edge of the belt, a sealing-bearing structure, including, a single body extended a length of the belt edge and having;
a first portion positioned between the parallel flanges to space the flanges and form a hous-ing into which the belt edge is received, and a second portion extending from the first portion inward toward the belt providing a surface with which the edge of the belt is inclined upward at an angle within the housing, whereby granular material conveyed on the upper surface of the belt extends into the housing and is turned back by the upwardly angled belt edge to obviate migration of the granular material around the belt edge to escape from the housing.
a first portion positioned between the parallel flanges to space the flanges and form a hous-ing into which the belt edge is received, and a second portion extending from the first portion inward toward the belt providing a surface with which the edge of the belt is inclined upward at an angle within the housing, whereby granular material conveyed on the upper surface of the belt extends into the housing and is turned back by the upwardly angled belt edge to obviate migration of the granular material around the belt edge to escape from the housing.
2. The sealing-bearing structure of Claim 1, including, a third portion extending beneath the belt edge and from the second portion to the housing entrance.
3. The sealing-bearing structure of Claim 2 is formed of a plas-tic such as polyethylene.
4. A seal and bearing structure for the edge of the belt of a conveyor for granular material, wherein, a first flange is extended outward from the centerline of the belt and over the belt, a second flange is extended outward from the centerline of the belt and under the belt, means for spacing and sealing the outer edges of the flanges, a bearing surface provided with the housing for the edge of the belt and inclined from the horizontal to position the edge of the belt upward, and a support structure extending from the inclined surface inward beneath the edge of the belt.
5. The seal and bearing structure of Claim 4, wherein, the spacing and sealing means and means for providing the inclined surface and means providing the support ex-tension from the inclined surface comprise a single body.
6. The seal and bearing structure of Claim 5 is formed of a plastic such as polyethylene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44335982A | 1982-11-22 | 1982-11-22 | |
| US443,359 | 1982-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1205039A true CA1205039A (en) | 1986-05-27 |
Family
ID=23760483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000437160A Expired CA1205039A (en) | 1982-11-22 | 1983-09-20 | Seal for edges of enclosed belt conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1205039A (en) |
-
1983
- 1983-09-20 CA CA000437160A patent/CA1205039A/en not_active Expired
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |