1. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprises at least one site, at least one control channel, at least one voice channel, and a plurality of receiving devices, a method for determining a control channel, the method comprising the steps of:
at a receiving device in the trunked radio communications system:
retrieving a first frequency, wherein the first frequency relates to a frequency in the 800 MHz spectrum;
tuning to about the first frequency;
tuning to about a second frequency wherein the second frequency is a channel separation from the first frequency, wherein the channel separation relates to a value of 12.5 kHz, if no control channel messages are decoded at the first frequency; and
iteratively incrementing the second frequency by the channel separation, if no control channel messages are decoded at the second frequency until the second frequency reaches an end of band frequency for the trunked radio communications system,
wherein the control channel messages are defined by Motorola’s 3600-baud radio trunking protocol.
2. The method of claim 1 further comprising stepping to a base frequency when the receiving device reaches the end of band frequency, if the first frequency is not the base frequency.
3. The method of claim 1 further comprising determining a control channel is not found, if at least one of a) the receiving device reaches the end of band frequency and the first frequency is a base frequency and b) the receiving device reaches the first frequency after iteratively incrementing.
4. The method of claim 1 further comprising the step of detecting energy before decoding for control channel messages.
5. The method of claim 1 wherein the receiving device is at least one of a subscriber, a subscriber unit, a radio, a mobile, a portable, a receiver, a scanner, and a scanner device.
6. The method of claim 1 wherein the first frequency relates to a value of 851.0000 MHz.
7. The method of claim 1 wherein the first frequency is stored in hexadecimal format.
8. The method of claim 1 wherein the end of band frequency relates to a value of 869.9875 MHz.
9. The method of claim 1 wherein relates to further comprises performing mathematical operations to arrive at 12.5 kHz.
10. The method of claim 1 wherein control channel messages are detected for about 200 msecs before determining that a control channel is not found.
11. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprises at least one site, at least one control channel, at least one voice channel, and a plurality of receiving devices, a method for determining a control channel, the method comprising the steps of:
at a receiving device in the trunked radio communications system:
retrieving a base frequency relating to 851.0000 MHz;
tuning to about the base frequency;
tuning to about a second frequency wherein the second frequency is a channel separation from the base frequency, wherein the channel separation relates to a value of 12.5 kHz, if no control channel messages are decoded at the base frequency; and
iteratively incrementing the second frequency by the channel separation, if no control channel messages are decoded at the second frequency until the second frequency reaches an end of band frequency for the trunked radio communications system,
wherein the control channel messages are defined by Motorola’s 3600-baud radio trunking protocol.
12. The method of claim 11 further comprising determining a control channel is not found, if the receiving device reaches the end of band frequency.
13. The method of claim 12 wherein the base frequency is stored in hexadecimal format.
14. The method of claim 12 wherein the end of band frequency relates to a value of 869.9875 MHz.
15. The method of claim 12 wherein mathematical operations may be performed on the channel separation to arrive at 12.5 kHz.
16. The method of claim 11 further comprising the step of detecting energy before decoding for control channel messages.
17. The method of claim 16 wherein energy is detected for about 10 msecs before determining whether energy is detected.
18. The method of claim 11 wherein the base frequency relating to 851.0000 MHz further comprises performing mathematical operations to arrive at 851.0000 MHz.
19. The method of claim 18 wherein relates to further comprises performing mathematical operations to arrive at 869.9875 MHz.
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 free-standing bag made of a thermoplastic synthetic film, comprising:
a front panel;
a back panel;
lateral seams connecting the front panel with the back panel, thereby forming a filling opening, and in a collapsed state the bag has an inwardly folded base, the inwardly folded base including a frontpanel fold and a backpanel fold, the frontpanel fold and backpanel fold being welded into the lateral seams;
an assembly strip being attached to the frontpanel fold and to the backpanel fold, the assembly strip being formed of a more rigid plastic film than the plastic film of the bag, the assembly strip terminating at a first distance from the lateral seams; and
a reinforcement strip being attached to the front panel and the back panel in an area of the filling opening on an interior andor exterior side, the reinforcement strip terminating at a second distance from the lateral seams,
wherein a value of the second distance of the reinforcement strip from each lateral seam is at least that of a height of the base fold in a collapsed state.
2. The free-standing bag according to claim 1, wherein, in the area of the filling opening, the front panel and the back panel are double-layered.
3. The free-standing bag according to claim 2, wherein the reinforcing strip is glued to the inner side of the double-layered area of the front panel and the back panel.
4. The free-standing bag according to claim 2, wherein, in the area of the filling opening, a handle is formed or welded on.
5. The free-standing bag according to claim 1, wherein the assembly strip is glued to an inner andor outer side of the base.
6. The free-standing bag according to claim 1, wherein a value of the first distance of the assembly strip from each lateral seam is at least that of a height of the base fold in a collapsed state.
7. The free-standing bag according to claim 1, wherein a value of the first distance of the assembly strip from each lateral seam is at least that of a height of the base fold in a collapsed state.
8. The free-standing bag according to claim 1, wherein a width of the assembly strip is equal to a width of the reinforcing strip such that the free-standing bag forms a box-shaped free-standing bag when the free-standing bag is in an unfolded state.
9. The free-standing bag according to claim 1, wherein the front panel and the back panel have a grip hole in the area of the filling opening, and
wherein the grip hole extends through the front panel, the back panel, and the reinforcement strip.
10. The free-standing bag according to claim 1, wherein said first distance and said second distance are greater than zero.
11. The free-standing bag according to claim 1, wherein said first distance is equal to said second distance.
12. A method for producing a free-standing bag according to claim 1, the method comprising:
conveying one or a plurality of horizontally spread-out webs of plastic film;
adding and attaching the assembly strip and the reinforcing strip;
folding the web of plastic film to form the front panel and the back panel;
inserting the base fold; and
forming the lateral seams by welding the web of plastic film.
13. A free-standing bag made of a thermoplastic synthetic film, comprising:
a front panel;
a back panel;
lateral seams connecting the front panel with the back panel, thereby forming a filling opening, and in a collapsed state the bag has an inwardly folded base, the inwardly folded base including a frontpanel fold and a backpanel fold, the frontpanel fold and backpanel fold being welded into the lateral seams;
an assembly strip being attached to the frontpanel fold and to the backpanel fold, the assembly strip being formed of a more rigid plastic film than the plastic film of the bag, the assembly strip terminating at a first distance from the lateral seams; and
a reinforcement strip being attached to the front panel and the back panel in an area of the filling opening on an interior andor exterior side, the reinforcement strip terminating at a second distance from the lateral seams,
wherein, in the area of the filling opening, the front panel and the back panel are double-layered;
wherein, a handle is connected to the double-layered area at least one connection location; and
wherein the reinforcing strip is arranged above the welding for the handle inside the double-layered area between the at least one connection location and the filling opening.
14. The free standing bag according to claim 13, wherein a value of the second distance of the reinforcement strip from each lateral seam is at least that of a height of the base fold in a collapsed state.
15. The freestanding bag according to claim 13, wherein a width of the assembly strip is less than a width of the reinforcing strip such that a width of the free-standing bag in the area of the inwardly folded base is less than a width of the filling opening of the free-standing bag when the free-standing bag is in an unfolded state.
16. The free standing bag according to claim 15, wherein a value of the second distance of the reinforcement strip from each lateral seam is at least that of a height of the base fold in a collapsed state.
17. A free-standing bag made of a thermoplastic synthetic film, comprising:
a front panel;
a back panel;
lateral seams connecting the front panel with the back panel, thereby forming a filling opening, and in a collapsed state the bag has an inwardly folded base, the inwardly folded base including a frontpanel fold and a backpanel fold, the frontpanel fold and backpanel fold being welded into the lateral seams;
an assembly strip being attached to the frontpanel fold and to the backpanel fold, the assembly strip being formed of a more rigid plastic film than the plastic film of the bag, the assembly strip terminating at a first distance from the lateral seams; and
a reinforcement strip being attached to the front panel and the back panel in an area of the filling opening on an interior andor exterior side, the reinforcement strip terminating at a second distance from the lateral seams,
wherein a width of the assembly strip is less than a width of the reinforcing strip such that a width of the free-standing bag in the area of the inwardly folded base is less than a width of the filling opening of the free-standing bag when the free-standing bag is in an unfolded state.