# Patent

## Title
Bootie level alert

## Abstract

A bootie application device that provides booties that slide along a rail system on tabs that releasably connect the booties to the rail system. A sensor detects when booties are not disposed at a position along the rail system and issues a bootie level signal. An alert indicates when the bootie level signal has been issued.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to U.S. Provisional Application Ser. No. 62/207,728 filed Aug. 20, 2015, and entitled BOOTIE LEVEL ALERT, which is incorporated by reference herein in its entirety.


FIELD
This invention relates to the field of shoe covers. More particularly, this invention relates to an apparatus for dispensing shoe covers over a shoe on a foot without the wearer handling the shoe cover.
INTRODUCTION
Many industries require their workers to wear protective clothing, either for the benefit of the environment in which the workers operate, or for the benefit of the workers themselves. For example, maintaining the cleanliness of the environment is important in industries such as pharmaceuticals, microelectronics, and food processing. On the other hand, there are a number of industries that produce dust, mist, spray, debris, and other hazardous materials, in which protective clothing is used to keep the workers clean or safe.
One item of protective clothing that is often used is shoe covers—so-called booties—that fit over a worker's feet, and either reduce the impurities that a worker brings into the controlled environment on his feet, or alternately, protect the worker's feet from the working environment.
Unfortunately, it can be very time-consuming to put on a pair of booties. Traditionally the process has been for the worker to take a couple booties out of a bin of such, walk over to a bench to sit down, and then—using both bands—place one bootie over each shoe. Not only is this a time-consuming process, but it requires the installation of benches (at accompanying cost and space), and also requires the workers to put down anything that they might be carrying in their hands.
Because of the time involved to implement this procedure, some workers attempt to pm their booties on without sitting down. Unfortunately, the required process of standing on one leg while putting a bootie on the other foot tends to make the worker unstable, resulting in accidents, damage to property, and injury to self and others.
Further, because of the inadequacies of both of the options described above, some workers will, at times, not put on the booties at all, which tends to degrade the environment, put the worker at enhanced risk, or both.
Semi-automated devices have been developed to assist workers in putting on booties, such as those devices described in U.S. Pat. Nos. 7,775,396 and 8,490,842, and published application 20130270288, the entire disclosures of which are incorporated herein by reference. However, these devices tend to introduce new issues of their own.
SUMMARY
The above and other needs are met by a bootie application device that provides booties that slide along a rail system on tabs that releasably connect the booties to the rail system. A sensor detects when booties are not disposed at a position along the rail system and issues a bootie level signal. An alert indicates when the bootie level signal has been issued.
In various embodiments according to this aspects of the invention, the sensor is a visual sensor. In some embodiments the sensor is a switch. In some embodiments the position along the rail system is selectable. In some embodiments the position along the rail system is predetermined. In some embodiments the alert is a light. In some embodiments the alert is an audible alarm. In some embodiments the position along the rail system is at a point where the booties have all been used, in some embodiments the position along the rail system is at a point where a standardized number of booties can be added to the booties application device. It could also send message to a tablet or handheld phone indicating that a shoe cover device was low on booties.



DRAWINGS
Further advantages of the invention are apparent by reference to the detailed description when considered in conjunction with the figures, which are not to scale so as to more clearly show the details, wherein like reference numbers indicate like elements throughout the several views, and wherein:
FIG. 1 depicts a perspective view of a bootie delivery system according to an embodiment of the present invention.
FIG. 2 depicts a first view of a track system for a bootie delivery system according to an embodiment of the present invention.
FIG. 3 depicts a second view of a track system for a bootie delivery system according to an embodiment of the present invention.
FIG. 4 depicts a view of a sensor and alert for a bootie delivery system according to an embodiment of the present invention.



DESCRIPTION
With reference now to the figures, there is depicted a shoe cover device 100, for both providing a store of booties 102, and facilitating the application of booties 102 to shoes, without the wearer having to handle the booties 102, or sit down. Thus, the shoe cover device 100 facilitates a faster, less invasive application of booties 102, and reduces the amount of space required in an ante room where booties 102 are to be applied.
In some embodiments the device 100 provides a store of booties 102 on an upper portion 112 of a rail system 104. The rail system 104 also delivers, opens, and stages the booties 102 for application at a lower portion 108 of the rail system 104. The booties 102 are releasably attached to the rail system 104.
In one embodiment, the rail system 104 includes a set of two rails 104a and 104b on one side of the device 100, and another set of two rails 104c and 104d on the other side of the device 100. Four tabs 106 are disposed around an elasticized opening of the bootie 102. Two of these four tabs 106 fit between the two rails 104a and 104b on one side of the device 100, and the other two of the four tabs 106 fit between the two rails 104c and 104d on the other side of the device 100.
In one embodiment, the two rails 104 of a given pair a/b or c/d of rails 104 are spaced apart such that a relatively thinner part of the tab 106 can slide easily between the rail pair 104 a/b or c/d, but a fatter part of the tab 106, disposed at a distal end of the tab 106, cannot pass easily through the gap between the rail pair 104 a/b or c/d, and thus the bootie 102 is retained by each tab 106 to the rail pair 104 a/b or c/d. In this manner, the spacing between the sets a/b or c/d of rails 104 on either side of the device 100 stretches the bootie 102 along its width.
As the bootie 102 slides down the rail system 104 to the lower portion 108 of the rail system 104, also referred to as the application zone 108, two tabs 106 on a given side of the device 100 are spread apart, thus stretching the bootie 102 along its length. Thus, in the application zone 108, the bootie 102 is opened up and configured to receive the shoe of the wearer.
The wearer places his shoe inside of the stretched-open bootie 102, and slides his foot backward out of the device 100. This motion either breaks the tabs 106 free from the rail system 104 in some manner, or slides the tabs 106 off of the end of the rail system 104, either of which action results in the bootie 102 being released by the device 100, and closing upon the shoe of the wearer. In some embodiments, this action also stretches the next bootie 102 open along its length, and pulls it into place in the application zone 108.
It is appreciated that the above describes just one embodiment of a rail system 104, and that other rails system 104 and tab 106 arrangements are also contemplated herein, such as single-rail rail system 104, with tabs 106 that releasably snap onto and off of the rail system 104.
Regardless of the specific configuration of the rail system 104 and the tabs 106, the rail system 104 is held in place on the device 100 by supports 110. The supports 110 hold the rail 104 pairs at an appropriate distance, one from another, so that the booties 102 are stretched at their width to an appropriate degree.
In some embodiments, the spacing between the rail sets 104 on either side of the device 100 is fairly critical, and thus, some way of adjusting the spacing is desirable. For example, if the spacing between the rails 104 in the upper portion 112 of the rail system 104 is not correct, then it can be very difficult to load the booties 102 into the device 100, or the booties 102 can be damaged by tearing the tabs 106 prematurely.
In some embodiments, this spacing is adjusted by swapping in supports 110 of different lengths. In other embodiments, this spacing is adjusted by making the supports 110 adjustable in length, such as by adjusting the length of the support 110, and then tightening it in place, such as with a wing nut. In this manner, the distance between the rail pairs 104 on either side of the device 100 can be adjusted. In yet another embodiment, the support 110 is somewhat self-adjusting, by connecting it at one end (either to the rail pair 104 or to the casing) by a tensioned fitting.
For example, and with particular reference to FIGS. 2 and 3, the support 110 can be a system of elements that cooperate one with another to provide both a manual and a self-adjusting tension and distance between the rail 104 sets a/b on one side of the device 100 and the rail 104 sets c/d on the other side of the device 100. It is appreciated that the support system 110 depicted on the left-hand side of FIGS. 2 and 3 could also be present on the right-hand side of these figures, or that a different support system 110 could be employed on either side of the device 100.
According to one embodiment, the support system 110 is connected on one end to a structural support 120, such as a frame member of the device 100. A support bar 122 is connected to the structural support 120, such as by a wing-nut or wing-bolt 126 that is fitted through a slot 124 in the support bar 122. Thus, by loosening the wing-bolt 126 and sliding the support bar 122 back and forth along the slot 124, and then tightening the wing-bolt 126, a manual method of adjusting the distance between the rails 104 a/b and rails 104 c/d is provided, which also manually adjusts the tension on the tabs 106 of the bootie 102.
In one embodiment, the support bar 122 is connected to a spacer member 114, which in turn is connected to one set of rails 104, either a/b or c/d, as depicted. The spacer member 114 holds the rails 104 a/b (for example) at the proper distance one from another, so that the tab 106 is retained between the rails 104 a/c without undue binding, but also so that the tab 106 does not come free from the rail system 104 until forceably removed by the wearer as described above.
The support bar 122 in one embodiment is connected to the spacer member 114 by a system that is both manually and automatically adjustable as to the tension on the bootie 102 and the distance between rail 104 sets a/b and c/d. For example, in one embodiment a threaded screw 116 fits loosely but retainably through a retaining hole in the support bar 122, and threads into the spacer member 114. Thus, a manual adjustment is provided by how far the threaded screw 116 is screwed into the spacer member 114. A lock nut or other means of retaining the threaded screw 116 at the desired position relative to the spacer member 114 is contemplated, but not depicted, so as to not unnecessarily encumber the drawings with elements that are relatively easily understood.
In some embodiments, one or more tensioning members 118 are provided between the support bar 122 and the spacer member 114. In the embodiment as depicted, the tensioning members 118 are coil springs 118, which are disposed around the threaded screw 116, and which tend to hold the rails 104 and spacer member 114 at a given distance from the support bar 122, but when a greater amount of tension is applied to the rails 104, will allow the rails 104 to pull further away from the support bar 122 and the frame 120 of the device 100, thus allowing easier movement of the bootie 102 without damaging the frangible tabs 106.
In other embodiments the function of the tensioning members 118 is provided by a leaf spring, an elastic member, or some other apparatus for allowing a tensioned separation between the spacer member 114 and one or both of the support bar 122 and the frame 120.
With reference now to FIG. 4, as the booties 102 are pulled off of the rail system 104, they slide down along the rail system 104. A sensor 200 is disposed so as to detect when the booties 102 are not disposed at a position along the rail system 104, and when that condition is detected, the sensor 200 issues a bootie level signal. An alert 202 indicates when the bootie level signal has been issued.
In some embodiments the sensor 200 is a visual sensor, such as a camera, that views a portion of the rail system 104, and determines when the booties 102 are no longer within at least a portion of the view of the camera. In some embodiments the visual sensor 200 is an LED and sensor combination which, when the booties 102 pass a certain point along the rail system 104, can “see” each other, thereby triggering the bootie level signal.
In some embodiments the sensor 200 is a switch, such as a mechanical switch that “feels” the presence of the booties 102 at a position along the rail system 104, and when there are no more booties 102 at that position, the switch senses the change and the bootie level signal is issued. Other types of sensors 200 are also contemplated.
In some embodiments the position of the switch 200 along the rail system 104 is selectable, and can be moved by a user according to their specific needs as to when to receive the alert. In some embodiments the position of the switch 200 along the rail system 104 is predetermined, such as by being placed in a fixed position along the rail system 104.
In some embodiments the alert 202 is a light. In various embodiments, the light can either be illuminated or extinguished when the bootie level signal is issued. In some embodiments the light flashes or changes color when the bootie level signal is issued. In other embodiments, a first light is illuminated when the bootie level signal is not issued, and then when the bootie level signal is issued, a second light is illuminated. Various combinations of illuminating and extinguishing one or more lights are also contemplated.
In some embodiments the alert 202 is an audible alarm. In some embodiments, the alert 202 is an indication on the display of a personal computer that is in data communication with the shoe cover device 100, and receives the bootie level signal. In some embodiments the alert 202 is disposed on the shoe cover device 100 itself, and in some embodiments the alert 202 is disposed at a location that is remote from or otherwise not disposed on the shoe cover device 100. In certain embodiments, the alert could include a message sent to a tablet or handheld phone indicating that the shoe cover device 100 was low on booties.
In some embodiments the position sensed by the sensor 200 along the rail system 104 is at a point where the booties 102 have all been used, and the shoe cover device 100 must be replenished with booties 102 in order to remain in service. In some embodiments the position sensed by the sensor 200 along the rail system 104 is at a point where a standardized number of booties 102 can be added to the shoe cover device 100 without overflowing the rail system 104. For example, booties 102 in one embodiment are packaged in stacks of 50 booties 102, and the sensor 200 issues the bootie level signal when the rail system 104 has sufficient available space along it to accommodate an entire stack of 50 booties 102.
The foregoing description of embodiments for this invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The embodiments are chosen and described in an effort to provide illustrations of the principles of the invention and its practical application, and to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled.

## Claims

1. In a bootie application device of the type that provides booties that slide along a rail system on tabs that releasably connect the booties to the rail system to a lower portion of the rail system for application to a shoe, wherein the rail system comprises a first rail on a first side of the bootie application device and a second rail on a second side of the bootie application device opposite the first side, the improvement comprising a sensor disposed at a position along the first rail that detects when booties are not disposed at the position along the first rail and issues a bootie level signal, wherein the position along the first rails is selectable, and an alert that indicates when the bootie level signal has been issued.

2. The bootie application device of claim 1, wherein the sensor is a visual sensor.

3. The bootie application device of claim 1, wherein the sensor is a light sensor.

4. The bootie application device of claim 1, wherein the sensor is a switch.

5. The bootie application device of claim 1, wherein the alert is a light.

6. The bootie application device of claim 1, wherein the alert is an audible alarm.

7. The bootie application device of claim 1, wherein the alert is an electronic message sent to a phone, tablet, or other portable electronic device.

8. In a bootie application device of the type that provides booties that slide along a rail system on tabs that releasably connect the booties to the rail system, the improvement comprising a sensor that detects when booties are not disposed at a position along the rail system, wherein the position along the rail system is selectable, and issues a bootie level signal, and an alert that indicates when the bootie level signal has been issued.

9. The bootie application device of claim 8, wherein the sensor is a visual sensor.

10. The bootie application device of claim 8, wherein the sensor is a light sensor.

11. The bootie application device of claim 8, wherein the sensor is a switch.

12. The bootie application device of claim 8, wherein the alert is a light.

13. The bootie application device of claim 8, wherein the alert is an audible alarm.

14. The bootie application device of claim 8, wherein the alert is an electronic message sent to a phone, tablet, or other portable electronic device.

15. In a bootie application device of the type that provides booties that slide along a rail system on tabs that releasably connect the booties to the rail system, the improvement comprising a mechanical switch that feels the presence of booties at a position along the rail system, wherein the position along the rail system is selectable, and wherein the mechanical switch detects when booties are not disposed at the position along the rail system and issues a bootie level signal, and an alert that indicates when the bootie level signal has been issued.

16. The bootie application device of claim 15, wherein the alert is a light.