1. A method for purchasing a media service from a media delivery service provider, the method comprising:
sending a request, by an application executing on a computer processor of a media distribution device, to the media delivery service provider requesting the media service;
authenticating, by the application, the media distribution device by comparing a permanent virtual circuit established between the media distribution device and the media delivery service provider with a predetermined permanent virtual circuit defined and programmed by the media delivery service provider;
upon determining the media distribution device is successfully authenticated, downloading a software key from the media delivery service provider to the media distribution device and automatically deleting the software key after a predetermined amount of time; and
upon determining the media distribution device is not successfully authenticated, downloading displayable data to the media distribution device from the media delivery service provider.
2. The method of claim 1, wherein the displayable data includes an instruction to contact a service representative of the media delivery service provider.
3. The method of claim 1, further comprising:
identifying information of the media distribution device; and
comparing the information to a customer record at the media delivery service provider;
determining whether the customer record indicates a customer associated with the customer record is in good standing; and
upon determining the customer is in good standing, permitting the media distribution device to purchase the media service.
4. The method of claim 3, wherein comparing the information to the customer record further includes matching a hardware serial number of the media distribution device with a registered hardware serial number of the customer record.
5. The method of claim 1, wherein the permanent virtual circuit comprises a predetermined physical communications path between the media distribution device and a communications component of the media delivery service provider.
6. The method of claim 1, wherein the permanent virtual circuit comprises a communications link utilizing a broadband connection with the media delivery service provider.
7. The method of claim 1, wherein the permanent virtual circuit comprises a communications link utilizing an asymmetric digital subscriber line with the media delivery service provider.
8. A computer program product for purchasing a media service from a media delivery service provider, the computer program product comprising a non-transitory storage medium containing instructions that when executed by a processing circuit perform a method, the method includes:
sending a request to the media delivery service provider for the media service;
authenticating a media distribution device by comparing a permanent virtual circuit established between the media distribution device and the media delivery service provider with a predetermined permanent virtual circuit defined and programmed by the media delivery service provider;
upon determining the media distribution device is successfully authenticated, downloading a software key from the media delivery service provider to the media distribution device and automatically deleting the software key after a predetermined amount of time; and
upon determining the media distribution device is not successfully authenticated, downloading displayable data to the media distribution device from the media delivery service provider.
9. The computer program product of claim 8, wherein the displayable data includes an instruction to contact a service representative of the media delivery service provider.
10. The computer program product of claim 8, wherein the method further comprises:
identifying information of the media distribution device; and
comparing the information to a customer record at the media delivery service provider;
determining whether the customer record indicates a customer associated with the customer record is in good standing; and
upon determining the customer is in good standing, permitting the media distribution device to purchase the media service.
11. The computer program product of claim 10, wherein comparing the information to the customer record further includes matching a hardware serial number of the media distribution device with a registered hardware serial number of the customer record.
12. The computer program product of claim 8, wherein the permanent virtual circuit comprises a predetermined physical communications path between the media distribution device and a communications component of the media delivery service provider.
13. The computer program product of claim 8, wherein the permanent virtual circuit comprises a communications link utilizing a broadband connection with the media delivery service provider.
14. The computer program product of claim 8, wherein the permanent virtual circuit comprises a communications link utilizing an asymmetric digital subscriber line with the media delivery service provider.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A screening deck for the screening of crushed stone material, comprising a plurality of screening elements arranged adjacent one another and forming an upper screening surface which defines a longitudinal direction in which the material travels; each screening element including multiple sides including two opposing ends and two opposing sides, each of the two opposing sides being arranged such that one end thereof is spaced from the other end in the longitudinal direction; at least one of said two opposing sides extending non-parallel to the longitudinal direction; the screening elements further including first and second screening elements of different respective heights arranged to create different elevations in the screening surface, and wherein at least one non-parallel side of the first screening elements is arranged to be in direct contact along the entire length of at least one non-parallel side of at least one of the second screening elements transversely adjacent to the first screening element.
2. The screening deck according to claim 1, wherein both of said two opposing sides of each screening element are non-parallel with the longitudinal direction.
3. A screening deck according to claim 2, wherein the different-height screening elements are arranged alternately in the longitudinal direction.
4. A screening deck according to claim 3, wherein the different-height screening elements are arranged alternately in a transverse direction oriented transversely of the longitudinal direction.
5. A screening deck according to claim 1, wherein the different-height screening elements are arranged alternately in the longitudinal direction.
6. A screening deck according to claim 1, wherein the different-height screening elements are arranged alternately in a transverse direction oriented transversely of the longitudinal direction.
7. A screening deck according to claim 1, further comprising carriers for supporting the screening elements, each screening element provided with fastening structure configured to be fastened to the carriers.
8. The screening deck according to claim 7, wherein the carriers are provided with elongated stanchions to which are fastened ends of the screening elements, both ends of each screening element including a snap lock structure interacting with the stanchions.
9. The screening deck according to claim 8, wherein the elongated stanchions form, together with the different-height screening elements, steps spaced apart along the longitudinal direction of the screening deck.
10. The screening deck according to claim 1, wherein each screening element includes a framework supporting a screening membrane.
11. The screening deck according to claim 10, wherein the framework and the screening membrane comprise polyurethane.
12. The screening deck according to claim 11, wherein the framework and the screening membrane comprise polyurethane of different respective hardnesses.
13. The screening deck according to claim 7, wherein the carriers are arranged transversely of the longitudinal direction.
14. The screening deck according to claim 7, wherein the carriers are oriented parallel to the longitudinal direction.
15. The screening deck according to claim 1, further comprising carriers for supporting the screening elements, each carrier including a stanchion and one shelf extending therefrom, and further comprising an adapter provided with a stanchion interacting with snap locks on one end of the screening element.
16. The screening deck according to claim 1, wherein the screening elements include holes, and wherein the holes are arranged with a transversal displacement.
17. The screening deck according to claim 16, wherein the transversal displacement is between groups of holes.
18. The screening deck according to claim 1, wherein the screening elements include holes, and wherein the holes are mutually parallel and have a first density of holes in a first portion closest to a wide end of the screening element that is greater than a second density of holes in a second portion closest to a narrow end of the screening element.
19. The screening deck according to claim 1, wherein each of two of the opposing ends being arranged such that one end thereof is spaced from the other end in the transverse direction.
20. The screening deck according to claim 1, wherein the upper screening surface in each of the plurality of screening elements defines a plane, wherein each of two of the opposing sides of the screening element and each of two of the opposing ends of the screening element circumscribe the plane, and wherein one of the two opposing ends has a shorter distance in a direction transverse to the direction in which the material travels than a second of the two opposing ends.
21. The screening deck according to claim 1, wherein at least one parallel side for one screening element is adjacent at least one non-parallel side for another of the plurality of screening elements.
22. The screening deck according to claim 1, wherein the arrangement of screening elements at different heights having at least one non-parallel side creates narrowing passages or winding paths for the material on the screening deck.
23. The screening deck according to claim 1, wherein at least one screening element is at a lower height than at least two adjacent screening elements.