Time tape

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The tape measure time machine is a time travel device from the future used by Time Anomaly Removal Crew agent Blendin Blandin, as well as Dipper and Mabel Pines in "The Time Traveler's Pig."

History
Blendin Blandin uses this time machine to travel to the events of "Tourist Trapped," "The Legend of the Gobblewonker," and "Headhunters" in order to retrieve time anomalies left by the twins, though it is only seen briefly on Blendin's belt in the second episode.

In "The Time Traveler's Pig," after Robbie uses icing the black eye Dipper accidentally gave Wendy as an opportunity to ask Wendy out on a date, Dipper seeks out a way to do the moment over and avoid hitting Wendy. When he and Mabel confront Blendin Blandin, whom Dipper blames for the incident, as the two bumped into each other as Dipper was trying to bring Wendy some ice, and learn that Blendin has just the device Dipper seeks. They steal the time machine and travel back to earlier that day, Dipper so he can fix his error and Mabel so she can relive winning Waddles, and do so again each time Dipper messes up. While Mabel helps Dipper carry out his complicated throw, Pacifica wins Waddles, which causes Mabel to panic and asks to go back in time again.

Dipper denies his sister her request, and the two fight for control of the device, traveling the various moments of history, including pioneer times, the distance future, etc. Once they return to the present in which Dipper has avoided hitting Wendy and Mabel lacks Waddles, the twins continue to fight for a bit before Mabel goes into a depression which, as shown in Dipper's travel to the future, she does not apparently recover from. Not wanting to see his sister heartbroken, Dipper goes back to the day of the Mystery Fair so Mabel can win her pig, sacrificing Wendy's affection in the process. Mabel thanks him, and the twins and their new pet are met by Blendin, who is angry due to Dipper and Mabel stealing his time machine. At that moment, the Time Paradox Avoidance Enforcement Squadron arrives to arrest Blendin, who is charged with Dipper's and Mabel's violation of the Time Traveler's Code of Conduct. Blendin tries to explain as agents Lolph and Dundgren take him away, but they do not believe him. Back in the future, the Time Baby sends Blendin back to fix the anomalies.

Operation
The user selects an amount of time indicated on the tape and releases it into the main body, then presses a button to go either back or forward the selected amount of time. In a flash of light, the individual goes to their desired time. If multiple people wish to travel together, they can either all touch the time machine or the person operating the device. Using it multiple times makes it grow warmer.